BROMELAINE

Bromelaine is the French- and European-market spelling commonly used for bromelain, a pineapple-derived proteolytic enzyme preparation composed principally of cysteine proteases together with other naturally occurring proteins and enzyme components. Commercial Bromelaine is obtained mainly from pineapple stem material and can also be obtained from pineapple fruit, with Ananas comosus being the principal botanical source. Generic food-enzyme bromelain is widely identified by CAS Number 9001-00-7, while purified stem bromelain and fruit bromelain are distinguished enzymatically as EC 3.4.22.32 and EC 3.4.22.33 respectively. Because Bromelaine is an enzyme preparation rather than one single small molecule, the commercial ingredient does not have one fixed molecular formula, one exact molecular weight or one universal physical-property profile. The key commercial specification is proteolytic activity, commonly reported in Gelatin Digesting Units per gram (GDU/g), Milk Clotting Units per gram (MCU/g), FCC Papain Units per gram (FCC PU/g), Casein Digestion Units or another validated assay. Bromelaine is used in food processing, meat tenderization, protein hydrolysis, dietary-supplement manufacture, pharmaceutical and topical enzyme technologies, research, biotechnology and other specialty processes where controlled proteolysis is required. The exact enzyme activity, source, carrier, moisture, microbiological specification, heavy-metal limits, allergen status, storage temperature and regulatory suitability must be taken from the current Ataman Chemicals TDS, SDS and batch COA for the supplied grade.

PRODUCT IDENTITY

Product Name: Bromelaine
Standard English Name: Bromelain
Ingredient Type: Proteolytic enzyme preparation
Enzyme Family: Cysteine endopeptidases / cysteine proteases
Botanical Source: Pineapple
Principal Botanical Species: Ananas comosus
Additional FDA-Recognized Source Species: Ananas bracteatus
Principal Commercial Source: Pineapple stem
Alternative Source: Pineapple fruit
Generic Bromelain CAS Number: 9001-00-7
Stem Bromelain Enzyme Commission Number: EC 3.4.22.32
Fruit Bromelain Enzyme Commission Number: EC 3.4.22.33
Historical / Generic Bromelain EC Reference: EC 3.4.22.4 appears in older food-additive and enzyme references
Chemical Class: Protein enzyme preparation
Catalytic Class: Peptide hydrolase / protease
Catalytic Mechanism: Cysteine-protease hydrolysis of peptide bonds
Fixed Molecular Formula: Not applicable to commercial Bromelaine because the ingredient is a protein-enzyme preparation and enzyme mixture
Fixed Molecular Weight: Not applicable to commercial Bromelaine
Purified Stem Bromelain Reference Molecular Mass: Major purified enzyme bands are commonly around approximately 24 kDa, with related proteolytic components also present
Typical Commercial Form: Powder
Typical Appearance: White, off-white, cream, pale tan or light-brown powder depending on purification and carrier
Odor: Characteristic mild enzyme / plant-derived odor
Solubility: Generally dispersible or soluble in water depending on grade and carrier
Primary Commercial Specification: Proteolytic enzyme activity
Common Activity Units: GDU/g, MCU/g, FCC PU/g, CDU/g, FIP units or supplier-defined protease units
Important Activity Principle: Activity values from different assay methods are not directly interchangeable unless a validated conversion or common reference method is specified
U.S. Food Regulatory Identity: Bromelain is listed under 21 CFR 184.1024 as an enzyme preparation derived from pineapple and used to hydrolyze proteins or polypeptides under current good manufacturing practice
JECFA Identity: Bromelain, INS 1101(iii), enzyme preparation
JECFA ADI: Not limited under the historical evaluation, with use limited by good manufacturing practice
EU Food-Enzyme Context: Food enzymes are governed by Regulation (EC) No 1332/2008; the Union-list process remains under evaluation and there is currently no completed Union list of authorized food enzymes
Current Medical Context: Bromelain-containing topical prescription enzyme therapy is approved for enzymatic debridement of certain deep thermal burns under medical supervision
Occupational Safety Principle: Enzyme dust can act as a respiratory sensitizer and should be controlled carefully during powder handling

SYNONYMS

Bromelaine, Bromélaïne, Bromelain, Bromelains, Bromelin, Bromelins, Pineapple Enzyme, Pineapple Protease, Pineapple Proteolytic Enzyme, Pineapple Protease Complex, Pineapple Enzyme Complex, Ananas comosus Protease, Ananas Protease, Stem Bromelain, Pineapple Stem Bromelain, Fruit Bromelain, Pineapple Fruit Bromelain, Bromelain Enzyme, Bromelain Protease, Bromelain Proteolytic Enzyme, Bromelain Enzyme Preparation, Bromelain Powder, Bromelain Food Enzyme, Bromelain Meat Tenderizer Enzyme, Bromelain Protein Hydrolysis Enzyme, Bromelain 9001-00-7, CAS 9001-00-7, EC 3.4.22.32 Stem Bromelain, EC 3.4.22.33 Fruit Bromelain, INS 1101(iii) Bromelain

WHAT IS BROMELAINE?

Bromelaine is a proteolytic enzyme preparation derived from pineapple tissue.
The ingredient is not one single purified molecule in most commercial applications.
Commercial Bromelaine commonly contains several cysteine proteases together with other pineapple-derived proteins and minor enzyme components.
The major commercial source is pineapple stem because stem material is abundant and can provide a concentrated protease source after juice or fruit processing.
Fruit-derived bromelain is chemically related but is enzymatically distinguished from stem bromelain.
The defining commercial property is the ability to hydrolyze proteins by cleaving peptide bonds.

STEM BROMELAIN

Stem bromelain is the principal commercial bromelain preparation used in many food, supplement and technical applications.
The corresponding enzyme classification for the major stem cysteine endopeptidase is EC 3.4.22.32.
Purified stem bromelain is a glycoprotein enzyme with molecular mass commonly around the mid-20-kDa range.
Commercial stem Bromelaine can contain additional proteolytic enzymes and non-enzyme protein material depending on purification.
The activity of a commercial stem preparation therefore cannot be predicted from protein concentration alone.
A defined enzyme-activity assay is essential for lot-to-lot control.

FRUIT BROMELAIN

Fruit bromelain is derived from pineapple fruit rather than stem tissue.
The principal fruit bromelain enzyme is assigned EC 3.4.22.33.
Fruit and stem bromelain are related cysteine proteases but they are not identical enzymes.
Their substrate preference, purification behavior and specific activity can differ.
Commercial product specifications should therefore state the source when source identity is important.
A generic Bromelaine specification should not silently substitute fruit and stem enzyme data.

ENZYME MIXTURE PRINCIPLE

Bromelaine is best described as an enzyme preparation or proteolytic complex.
A powder can contain active protease, other proteins, natural carbohydrate material, mineral salts, moisture and permitted processing carriers.
Highly purified research enzyme can behave differently from food- or supplement-grade Bromelaine.
An activity-adjusted commercial grade can also contain a carrier added to standardize enzyme strength.
Therefore, percentage protein, powder weight and enzyme activity are separate quality concepts.
The batch COA should identify the activity assay and the activity specification explicitly.

CYSTEINE PROTEASE MECHANISM

Bromelaine enzymes belong mainly to the cysteine-protease class.
A reactive cysteine residue participates directly in cleavage of peptide bonds.
The enzyme binds protein substrate and catalyzes hydrolysis of the peptide linkage.
Large proteins are progressively converted into smaller peptides and amino-acid-containing fragments.
The reaction requires water and depends strongly on pH, temperature, substrate accessibility and enzyme activity.
Excessive heat or strongly denaturing conditions can irreversibly reduce protease activity.

PROTEOLYTIC ACTIVITY

Proteolytic activity is the defining commercial measurement for Bromelaine.
Activity indicates how rapidly a standardized amount of enzyme preparation hydrolyzes a defined protein substrate under defined test conditions.
Two Bromelaine powders with the same mass can have very different practical strength.
For this reason, a specification such as 500 mg of Bromelaine is incomplete unless the enzyme activity is also stated.
Activity should be reported per gram or per dosage unit using a defined analytical method.
Purchasing and formulation calculations should compare active enzyme performance rather than powder weight alone.

GDU ACTIVITY

GDU means Gelatin Digesting Unit.
GDU assays measure the ability of Bromelaine to digest gelatin under standardized conditions.
Commercial activity is commonly reported as GDU per gram.
A higher GDU/g value indicates greater proteolytic activity per unit mass under that assay.
The GDU method is widely used in dietary-supplement and raw-material markets.
A batch specification should define the actual GDU test method rather than relying only on the unit abbreviation.

MCU ACTIVITY

MCU means Milk Clotting Unit.
MCU assays quantify activity through coagulation or proteolysis of a standardized milk-protein system.
MCU/g is another long-established way of specifying bromelain strength.
Published approximate relationships between MCU and GDU exist, but they should not replace a supplier's validated assay method.
Substrate composition, pH, temperature and endpoint affect the result.
For commercial comparison, all candidate materials should ideally be tested using the same method.

FCC PAPAIN UNITS

FCC Papain Units are also used to express proteolytic enzyme activity in some bromelain specifications and natural-health-product frameworks.
This assay uses a different substrate and analytical definition from GDU and MCU.
A current Canadian natural-health-product monograph uses an approximate relationship of one GDU to 15,000 FCC Papain Units for bromelain activity expression.
Such conversion factors are useful for regulatory or specification translation only when the referenced assay relationship is applicable.
They should not be used to claim exact equivalence between every commercial assay system.
The COA should state both the activity value and the test method.

CASEIN AND OTHER PROTEASE UNITS

Casein Digestion Units, tyrosine-release units, FIP units and manufacturer-defined protease units can also appear on Bromelaine documents.
These methods use different substrates and endpoints.
Activity numbers can therefore differ by orders of magnitude even when the underlying enzyme preparation is similar.
A high numerical value in one unit does not automatically indicate a stronger product than a lower numerical value in another unit.
Cross-supplier comparisons should normalize to one method whenever possible.

PH EFFECTS

Bromelaine protease activity depends on pH.
Purified stem bromelain reference data commonly show an activity optimum around mildly acidic to neutral conditions, approximately pH 6-7.
Commercial preparations can remain active over a broader range depending on stabilizers and substrate.
Very acidic or strongly alkaline conditions can reduce enzyme stability over time.
The optimum pH for meat, beverage, dairy, supplement or research use can differ because the substrate and exposure time differ.
Process pH should therefore be optimized experimentally for the actual commercial grade.

TEMPERATURE EFFECTS

Temperature strongly affects Bromelaine reaction rate and enzyme stability.
Increasing temperature accelerates proteolysis until the enzyme approaches its thermal-stability limit.
Purified stem bromelain references often show high activity around approximately 50-60°C under short assay conditions.
Prolonged exposure above the stable range can denature the enzyme and reduce activity irreversibly.
A short optimum-temperature assay should not be interpreted as a recommended long-term storage temperature.
Commercial Bromelaine powders should normally be stored cool and dry according to the current product specification.

ENZYME DENATURATION

Bromelaine is a protein and can lose its native three-dimensional structure.
Heat, strong acid, strong alkali, oxidizing agents, certain solvents and prolonged moisture exposure can accelerate denaturation.
Denatured bromelain can still contribute protein mass but will no longer deliver the same catalytic activity.
This is why activity testing is more meaningful than total protein alone.
Manufacturing processes should avoid unnecessary high temperature after enzyme addition when active Bromelaine must remain in the final product.

WATER ACTIVITY AND MOISTURE

Dry enzyme powders are generally more stable than aqueous enzyme solutions.
Water increases molecular mobility and can accelerate autolysis, microbial growth or other degradation.
Bromelaine can digest protein components within the enzyme preparation itself when held in aqueous solution for prolonged periods.
Powder moisture should therefore be controlled according to the grade specification.
Diluted enzyme solutions are normally prepared close to the time of use unless specifically stabilized.
Stored solutions require validated preservation, temperature and activity-retention data.

APPLICATIONS

Meat tenderization
Bromelaine hydrolyzes muscle and connective-tissue proteins and is widely used to tenderize beef, poultry and other protein foods under controlled conditions.

Meat marinades
Bromelaine can be incorporated into marinades or seasoning systems where proteolysis is used to improve tenderness.

Dry meat tenderizers
Activity-standardized Bromelaine powder can be blended into dry tenderizer formulations with salt, seasoning or carrier ingredients.

Injected meat systems
Selected industrial meat-processing systems can use controlled protease addition in brines or injection solutions when uniform enzyme distribution and 
subsequent heat inactivation are validated.

Protein hydrolysates
Bromelaine can hydrolyze food proteins into smaller peptides for flavor, nutritional or process applications.

Plant-protein hydrolysis
Soy, pea and other plant proteins can be treated with Bromelaine to modify solubility, viscosity, digestibility and peptide profile.

Animal-protein hydrolysis
Fish, collagen, gelatin, dairy and meat-derived proteins can be hydrolyzed with Bromelaine under controlled conditions.

Gelatin hydrolysis
Bromelaine readily attacks gelatin and is directly characterized by gelatin-digestion activity.

Collagen modification
Proteolytic action can partially hydrolyze collagen-containing materials, although excessive treatment can destroy desired texture.

Seafood processing
Selected seafood processes can use proteolytic enzymes to modify texture, assist protein recovery or produce hydrolysates.

Fish-protein hydrolysates
Bromelaine can produce peptide-rich hydrolysates from fish-processing side streams under controlled food-enzyme conditions.

Flavor development
Controlled proteolysis can generate peptides and amino compounds that alter savory flavor and fermentation behavior.

Flavoring preparations
FDA food-substance information recognizes bromelain functions including enzyme, flavor enhancer, flavoring agent or adjuvant, processing aid and texturizer.

Texture modification
Bromelaine can soften protein-rich foods by partial hydrolysis of structural proteins.

Food processing aid
Bromelaine is used as a processing enzyme when its technological effect is needed during manufacture rather than as a conventional nutritive ingredient.

Dietary supplements
Activity-standardized Bromelaine is widely used in dietary-supplement products, where labeling should state enzyme activity as well as weight.

Digestive-enzyme supplements
Bromelaine can be included in digestive-enzyme products because it hydrolyzes dietary protein.

Multi-enzyme supplements
Bromelaine is combined with proteases, lipases, carbohydrases or plant enzymes in multi-enzyme formulas, subject to supplement regulation.

Sports-nutrition enzyme blends
Selected protein-digestion formulas use Bromelaine as part of the protease system.

Protein powder formulations
Bromelaine can be added to selected protein products when controlled enzymatic activity is desired, although storage compatibility must be validated.

Functional-food enzyme systems
Bromelaine can be used as a processing enzyme in protein-based functional foods under the applicable food-enzyme rules.

Brewing applications
Proteolytic enzymes can reduce high-molecular-weight protein fractions that contribute to haze or processing difficulties in selected beverage systems, although process-specific validation is required.

Beverage protein clarification
Bromelaine can be evaluated where controlled protein hydrolysis improves clarity, filtration or stability.

Baking and dough systems
Protease can weaken gluten or other cereal proteins and can therefore be used cautiously where softer dough or reduced elasticity is desired.

Biscuit and cracker processing
Controlled protease treatment can reduce dough strength in selected low-elasticity baked products.

Confectionery protein processing
Bromelaine can modify gelatin or other proteins in confectionery processes, but residual active enzyme can prevent gel formation if not controlled.

Dairy protein hydrolysis
Bromelaine can hydrolyze casein and whey proteins to modify functional properties or create peptide fractions.

Milk-protein research
Milk-clotting activity provides one traditional assay basis and Bromelaine is used in research on casein proteolysis.

Cheese and dairy research
Pineapple proteases are studied as plant-derived milk-clotting or proteolytic enzymes, although bitterness and specificity must be controlled for practical 
cheesemaking.

Pet-food protein processing
Bromelaine can be evaluated as a protein-hydrolysis enzyme in pet-food processing subject to feed and food-grade regulatory requirements.

Animal-feed enzyme research
Proteolytic activity can be studied for feed-protein processing, but commercial feed authorization must be verified for the target jurisdiction.

Pharmaceutical enzyme preparations
Bromelaine is used in regulated pharmaceutical and medicinal enzyme technologies where grade, purity and clinical requirements are much stricter than ordinary food-enzyme specifications.

Topical enzymatic debridement
A prescription topical enzyme product containing pineapple-derived bromelain proteases is approved for debridement of certain deep thermal burns in adults and is administered only by trained healthcare professionals.

Wound-debridement research
Bromelain-based proteolysis is studied for selective removal of devitalized protein tissue under medical control.

Laboratory proteolysis
Bromelaine can be used as a general cysteine protease for digestion of protein substrates in research.

Protein-structure studies
Controlled proteolysis can help researchers investigate protein domains, accessibility and degradation behavior.

Biotechnology sample preparation
Bromelaine can be used where selective or broad protein digestion is compatible with the analytical workflow.

Peptide production
Bromelaine can generate peptide fractions from protein substrates for research or food-development work.

Protein-solubility modification
Partial hydrolysis can reduce molecular size and expose hydrophilic groups, changing the solubility profile of protein ingredients.

Emulsion modification
Proteolysis of interfacial proteins can alter food-emulsion stability, which can be useful or undesirable depending on the process.

Waste-stream valorization
Bromelaine can convert protein-rich food-processing side streams into peptide hydrolysates for higher-value applications.

Pineapple by-product valorization
Commercial bromelain production itself can add value to pineapple stem and processing biomass that would otherwise have limited use.

MEAT TENDERIZATION

Meat tenderization is one of the best-established technical applications for Bromelaine.
Proteolysis breaks peptide bonds in myofibrillar and connective-tissue proteins.
The result is reduced mechanical toughness and easier chewing.
Enzyme dose, time, temperature and method of application are critical because excessive proteolysis can create a mushy or pasty texture.
Surface application can create an outer layer that is more tenderized than the center.
Injection, tumbling or controlled distribution can improve uniformity in industrial systems.

CONTROLLING OVER-TENDERIZATION

Bromelaine remains active until it is denatured or conditions become unfavorable.
Too much enzyme or too much contact time can cause severe structural breakdown.
This is especially important in thin meat cuts and marinades held for extended periods.
Thermal cooking normally reduces or eliminates active protease after sufficient heat treatment.
A tenderizer process should therefore define enzyme activity per kilogram of meat rather than relying only on powder percentage.
Pilot trials should evaluate texture after the complete marination and cooking cycle.

PROTEIN HYDROLYSATE PRODUCTION

Bromelaine can be used to manufacture protein hydrolysates from animal or plant proteins.
The enzyme reduces average peptide size and can change solubility, viscosity, foaming and emulsifying properties.
Degree of hydrolysis depends on activity dose, enzyme-to-substrate ratio, pH, temperature and reaction time.
The reaction can be stopped by heat inactivation or another validated method.
Hydrolysate flavor can become bitter when hydrophobic peptide fragments are generated.
Process optimization should therefore consider both functional properties and sensory quality.

DIETARY SUPPLEMENT USE

Bromelaine is widely sold as a dietary-supplement ingredient.
Supplement strength should be described using proteolytic activity in addition to the mass of enzyme preparation.
Two capsules containing the same milligram amount can provide very different activity if their GDU/g or FCC PU/g differs.
Claims must follow the dietary-supplement rules of the target jurisdiction.
In the United States, dietary supplements are not approved by FDA before marketing in the same way as prescription drugs.
Disease-treatment claims should not be made for an ordinary supplement unless the product follows the applicable drug pathway.

MEDICAL EVIDENCE CONTEXT

Bromelaine has been studied for multiple oral and topical health-related uses.
Current U.S. public-health guidance notes that the quality of evidence for many promoted oral uses remains limited or mixed.
Some research suggests possible benefit for selected postoperative symptoms, but evidence is not sufficient to generalize broad therapeutic claims.
A regulated topical bromelain-containing prescription treatment for severe burn debridement is a separate medical product and should not be confused with dietary-supplement powder.
A technical raw-material page should therefore describe established enzyme functions and regulated uses without presenting unapproved therapeutic claims as proven.

TOPICAL BURN DEBRIDEMENT

Pineapple-derived proteolytic enzymes are used in a regulated topical prescription product for enzymatic removal of eschar from certain deep thermal burns.
The FDA approved the product in December 2022 for use by healthcare professionals in adults under the labeled conditions.
The medicinal product contains a defined concentrate of proteolytic enzymes enriched in bromelain rather than ordinary food-grade Bromelaine powder.
Application is a specialized clinical procedure and not a general home-use application.
Industrial, food or supplement Bromelaine should never be substituted for the regulated medicinal preparation.

FOOD REGULATORY STATUS IN THE UNITED STATES

U.S. regulation 21 CFR 184.1024 identifies bromelain as an enzyme preparation derived from pineapple.
The regulation recognizes CAS Number 9001-00-7.
Its characterizing activity is peptide hydrolase activity.
The ingredient is affirmed as GRAS for use as an enzyme to hydrolyze proteins or polypeptides under current good manufacturing practice.
Use level is limited by current good manufacturing practice rather than by one universal numerical maximum.
Commercial food use still requires a food-grade preparation meeting applicable enzyme-preparation requirements and suitable microbiological and contaminant specifications.

JECFA AND CODEX CONTEXT

JECFA identifies bromelain as INS 1101(iii) and classifies it as an enzyme preparation.
The historical JECFA evaluation assigned an ADI 'not limited'.
The evaluation also states that use is limited by good manufacturing practice.
An ADI not limited should not be interpreted as permission for unlimited technical dosage.
Enzyme dose remains constrained by technological need, product quality, good manufacturing practice and national food law.

EU FOOD ENZYME CONTEXT

European food-enzyme regulation is governed principally by Regulation (EC) No 1332/2008.
The system requires food enzymes to undergo safety evaluation before inclusion in the future Union list.
The European Commission currently states that the Union list has not yet been completed because evaluations are still ongoing.
Therefore, a broad statement that Bromelaine is universally 'EU approved' as a food enzyme would be inaccurate.
Commercial food use should be assessed under the current transitional rules, national provisions and the exact food-enzyme application status.

ENZYME ACTIVITY STANDARDIZATION

Commercial Bromelaine is often standardized to a minimum activity rather than to one chemical purity percentage.
The manufacturer can blend batches or add an inert food-grade carrier to achieve a target activity.
A powder specified at 2,400 GDU/g, for example, is not chemically identical to every other powder with the same activity value.
Moisture, carrier type, microbiology and residual plant material can differ.
Customers should therefore compare complete specifications rather than activity alone.

GRADE DIFFERENTIATION

Food grade, supplement grade, pharmaceutical grade and research grade Bromelaine are not automatically interchangeable.
Food grade requires food-enzyme purity, microbiology and contaminant controls appropriate to food manufacture.
Supplement grade requires suitable activity, identity and dietary-supplement quality documentation.
Pharmaceutical grade can require compendial, clinical, sterility-related or product-specific controls far beyond ordinary food specifications.
Research-grade enzyme can be highly purified but may contain laboratory preservatives or stabilizers that make it unsuitable for food use.
The intended end use should therefore be declared before grade selection.

QUALITY CONTROL

Important Bromelaine quality-control parameters include identity, botanical source, proteolytic activity, appearance, moisture, microbiological quality, heavy metals, arsenic or elemental impurities where specified, carrier composition and absence of objectionable contamination.
Food and supplement grades can also require limits for pathogens such as Salmonella and for total microbial counts.
Activity should be tested using the exact method stated on the specification.
A change in assay method can create an apparent activity change even when the enzyme preparation itself is similar.
The current Ataman Chemicals specification and batch COA should control commercial acceptance.

IDENTITY TESTING

Identity can be confirmed by botanical traceability, protease activity, electrophoretic pattern, chromatographic methods or other validated enzyme-identification approaches.
Highly purified bromelain can show characteristic protein bands and isoelectric behavior.
Routine commercial food-grade identity does not necessarily require the same analytical depth as research-grade enzyme.
The specification should match the intended use and regulatory requirement.

ACTIVITY TESTING

Activity testing must control substrate, pH, temperature, incubation time and endpoint.
Small method changes can alter the numerical result substantially.
The laboratory should therefore use a validated standard operating procedure.
Reference standards and control samples improve lot-to-lot comparability.
Activity should be reported on the same moisture or as-is basis used in the commercial specification.

MOISTURE

Moisture affects enzyme stability and powder handling.
Excess moisture can increase caking, microbial risk and activity loss.
Very low moisture can improve storage stability but may create a fine dusty powder that requires stronger containment.
Moisture should be measured by the validated method defined for the grade.
Open containers should be resealed promptly to reduce moisture pickup.

MICROBIOLOGICAL QUALITY

Bromelaine is derived from botanical material and requires microbiological control.
Food- and supplement-grade specifications commonly control total aerobic count, yeasts and molds, coliforms or Enterobacteriaceae, and specified pathogens.
Exact limits depend on jurisdiction, grade and intended use.
Heat sterilization cannot be applied casually because heat can destroy enzyme activity.
Microbiological quality therefore depends strongly on raw-material hygiene, extraction, filtration, drying and controlled packaging.

HEAVY METALS AND ELEMENTAL IMPURITIES

Botanical enzyme preparations can require testing for lead, arsenic, cadmium, mercury or total heavy metals according to the target market.
Exact limits vary by food, supplement and pharmaceutical framework.
Elemental impurity testing should use validated methods such as ICP-based analysis where required.
A low heavy-metal result in one batch should not be generalized to all sources without ongoing supplier control.

CARRIER MATERIALS

Commercial Bromelaine can be standardized with a carrier or diluent.
Maltodextrin and other food-compatible carriers can be used in some enzyme preparations, although the exact carrier must be confirmed from the product specification.
Carrier changes can affect bulk density, flowability, hygroscopicity and activity per gram.
The carrier must also be considered for allergen, GMO, food, halal, kosher or other customer documentation where relevant.
Ataman Chemicals documentation should identify the supplied-grade composition where disclosure is commercially required.

BULK DENSITY

Bulk density is a powder-handling property rather than an intrinsic molecular property of Bromelaine.
It depends on particle size, carrier, moisture and drying process.
Bulk density affects packaging volume, tablet compression, capsule filling and feeder calibration.
The actual value should be taken from the product-specific TDS when important to manufacturing.

PARTICLE SIZE

Particle size influences dustiness, dissolution and blending uniformity.
Fine powder disperses rapidly but increases airborne enzyme exposure.
Coarser granulated forms can reduce dust and improve handling.
Supplement tableting and sachet blending can require tight particle-size control.
Dust-control performance should be considered alongside dissolution speed.

OCCUPATIONAL RESPIRATORY SENSITIZATION

Proteolytic enzymes are recognized occupational allergens and Bromelaine can induce IgE-mediated respiratory sensitization.
Published occupational cases have included rhinitis, eye symptoms and asthma after repeated inhalation exposure to bromelain-containing dust.
Sensitization risk is particularly relevant during weighing, sieving, dumping and dry blending.
Once a worker is sensitized, very low subsequent exposure can provoke symptoms.
Engineering controls should therefore minimize airborne enzyme dust rather than relying only on personal protective equipment.
Closed transfer, local exhaust ventilation, low-dust grades and suitable respirators can be required based on risk assessment.

PINEAPPLE ALLERGY

Bromelaine originates from pineapple and can cause allergic reactions in susceptible individuals.
People with known pineapple allergy require particular caution.
Cross-reactivity has been described among plant cysteine proteases including bromelain and papain.
Allergy risk is relevant both to consumers of supplements and to workers handling concentrated enzyme powder.
A technical product page should not claim Bromelaine is universally non-allergenic.

SKIN AND EYE EXPOSURE

Proteolytic enzymes can irritate skin and eyes by digesting protein at the contact surface.
Powder should be handled to avoid direct eye contact and prolonged skin contact.
Safety glasses, gloves and protective clothing are appropriate for bulk handling.
Fine dust should not be brushed from skin aggressively because friction can spread the powder.
Wash exposed skin thoroughly with water and mild soap.

INGESTION AND SUPPLEMENT SAFETY

Oral bromelain is generally reported as well tolerated in many adults at typical supplement-use levels.
Commonly reported adverse effects include gastrointestinal upset and diarrhea.
Allergic reactions can occur.
Potential medicine interactions and bleeding-related concerns are reasons for consumers using medications to seek healthcare advice before supplement use.
Pregnancy and breastfeeding safety data remain limited.
These consumer-health considerations are separate from the occupational handling of concentrated enzyme powder.

FIRST AID

After inhalation of enzyme dust, move the affected person to fresh air and obtain medical attention if coughing, wheezing, rhinitis or breathing difficulty occurs.
Respiratory symptoms after enzyme exposure can indicate sensitization and should not be ignored.
After eye contact, rinse cautiously with clean water for several minutes and obtain medical attention if irritation persists.
After skin contact, wash thoroughly and remove contaminated clothing.
After accidental ingestion of concentrated industrial raw material, rinse the mouth and seek medical advice according to the current SDS.
Individuals with known pineapple or protease allergy require particular caution.

SPILL MANAGEMENT

Avoid creating airborne dust during cleanup of spilled Bromelaine powder.
Do not sweep aggressively with a dry broom.
Use a suitable HEPA-filtered industrial vacuum or controlled damp-cleaning method where compatible with site procedures.
Prevent enzyme powder from becoming airborne during waste transfer.
Wet Bromelaine residues can remain proteolytically active and can irritate skin.
Waste should be sealed in labeled containers and disposed of according to the current SDS and local rules.

FIRE RESPONSE

Bromelaine powder is an organic proteinaceous material.
Fine organic powder can contribute to combustible-dust risk under suitable dispersion and ignition conditions.
The enzyme itself is not handled as a low-flash-point liquid.
Fire response should consider packaging materials, carriers and surrounding combustibles.
Thermal decomposition can generate carbon oxides, nitrogen-containing fumes and other irritating products.
The current SDS should control firefighting measures.

STORAGE

Bromelaine should be stored cool, dry and tightly sealed.
Heat and moisture accelerate activity loss.
The powder should be protected from direct sunlight and high humidity.
Repeated opening should be minimized because humid air can increase caking and enzyme degradation.
Food and supplement grades should be protected from odor, pest and microbiological contamination.
The current Ataman Chemicals TDS and SDS should control the exact recommended storage temperature and shelf life.

COLD STORAGE

Lower storage temperature can improve retention of enzyme activity when the grade and packaging are designed for it.
Some highly purified or liquid laboratory enzyme preparations require refrigeration.
Commercial dry food-grade Bromelaine can have different storage instructions and should not automatically be refrigerated if condensation risk is not controlled.
When a cold package is opened in humid air, condensation can wet the powder.
The container should therefore be allowed to equilibrate according to the product handling procedure before opening if refrigerated storage is used.

AQUEOUS SOLUTION STABILITY

Bromelaine is generally less stable in solution than in dry powder form.
The enzyme can undergo autolysis or gradual loss of native structure in water.
Microbial growth is also possible in unpreserved aqueous protein solutions.
Working solutions should therefore be prepared close to use unless a validated stabilized formulation is available.
Temperature, pH and preservative system should be controlled for any stored solution.

REGULATORY CONSIDERATIONS

Bromelaine can fall under different regulatory frameworks depending on how it is supplied and used.
Food-enzyme use is governed by food-additive and enzyme rules.
Dietary-supplement use is governed by supplement ingredient and labeling law.
Pharmaceutical or burn-debridement use requires medicinal-product authorization and cannot be inferred from food-grade enzyme status.
Research enzyme can contain preservatives or salts not suitable for food.
The same enzyme name therefore does not make food, supplement, pharmaceutical and research grades interchangeable.
Ataman Chemicals can provide current commercial documentation for the exact supplied grade, while the downstream manufacturer remains responsible for finished-product compliance.

COMMON FORMULATION PROBLEMS

Two Bromelaine powders have the same milligram dose but different performance
The enzyme activities differ. Compare GDU/g, MCU/g, FCC PU/g or another common assay rather than powder weight alone.

Supplier quotes very high activity number in a different unit
Activity units can differ by orders of magnitude. Compare products using the same substrate and method before concluding one grade is stronger.

GDU and MCU values do not match an expected conversion
Approximate conversions are not exact across every assay. Use the actual supplier method and, when necessary, retest both materials with one laboratory method.

Bromelaine loses activity during storage
Heat, humidity, oxygen exposure or excessive storage time may be responsible. Review storage temperature, packaging and moisture.

Bromelaine solution loses activity quickly
Aqueous enzyme is less stable and can undergo autolysis. Prepare fresh working solution or use a validated stabilized formulation.

Powder cakes in the drum
Moisture pickup has increased. Improve package sealing, humidity control and desiccation strategy where suitable.

Powder creates excessive dust
Particle size is too fine for the handling method. Use closed transfer, local exhaust or a low-dust / granulated grade.

Worker develops rhinitis or asthma symptoms
Bromelaine can cause occupational respiratory sensitization. Stop exposure and follow occupational-medical procedures immediately.

Worker with papain allergy reacts to Bromelaine
Cross-reactivity between plant cysteine proteases has been reported. Avoid exposure and obtain medical evaluation.

Consumer with pineapple allergy asks whether Bromelaine is safe
Pineapple-derived bromelain can cause allergic reactions. Individual medical advice is appropriate for known pineapple allergy.

Meat becomes mushy
Enzyme dose, contact time or temperature is too high. Reduce active Bromelaine exposure and validate the full cooking process.

Meat is tender only on the surface
The enzyme has not penetrated uniformly. Improve distribution through controlled tumbling, injection or process design where permitted.

Protein hydrolysate becomes bitter
Excess hydrolysis can generate hydrophobic bitter peptides. Reduce degree of hydrolysis or change process conditions.

Protein hydrolysate remains too viscous
Hydrolysis is incomplete or substrate accessibility is poor. Increase validated activity, time or process mixing rather than adding powder blindly.

Reaction stops after heating
Bromelaine has been thermally denatured. Add enzyme after the high-temperature step or reduce thermal exposure if active enzyme is still required.

Reaction is too slow at low temperature
Enzyme kinetics are reduced. Increase temperature within the validated stability window or extend time.

Activity falls at extreme pH
Strong acid or alkali can denature the enzyme. Adjust pH closer to the validated activity range.

Baking dough becomes too weak
Proteolysis has degraded gluten excessively. Reduce Bromelaine dose or contact time.

Gelatin dessert fails to set
Residual active Bromelaine is digesting gelatin. Heat-inactivate the enzyme before gel formation or avoid active enzyme in the finished gel.

Milk system coagulates unexpectedly
Bromelaine has milk-clotting / caseinolytic activity. Review enzyme dose and order of addition.

Beverage becomes hazy after enzyme treatment
Protein hydrolysis can expose new aggregation behavior or the enzyme preparation can add insoluble material. Optimize clarification and filtration.

Supplement manufacturer compares products only by mg per capsule
Mass alone is not a measure of bromelain strength. Activity per dose should also be declared.

Supplement label makes broad disease-treatment claims
Ordinary dietary-supplement Bromelaine is not automatically an approved drug. Claims must follow the applicable supplement and drug regulations.

Food processor assumes GRAS means unlimited dosage
21 CFR 184.1024 limits use by current good manufacturing practice and technological need, not by an unlimited dosing concept.

EU customer asks whether Bromelaine is on a completed Union list
The European Commission currently states that the Union list of authorized food enzymes has not yet been completed.

Customer requests one molecular formula
Bromelaine is a protein-enzyme preparation and does not have one fixed small-molecule formula.

Customer requests one molecular weight
Commercial Bromelaine is an enzyme mixture; purified major stem bromelain is around the mid-20-kDa range, but one molecular weight does not define the commercial preparation.

Customer assigns EC 3.4.22.32 to every Bromelaine preparation
EC 3.4.22.32 refers specifically to stem bromelain; fruit bromelain is EC 3.4.22.33 and older generic references can use EC 3.4.22.4.

Food customer uses laboratory-grade Bromelaine
Research enzyme can contain laboratory preservatives or stabilizers unsuitable for food. Use an appropriate food-grade preparation.

Pharmaceutical customer uses food-grade Bromelaine
Food-grade status does not establish pharmaceutical suitability. Medicinal applications require the applicable pharmaceutical specification and authorization.

Bromelaine powder is added before a pasteurization step
Heat can inactivate the enzyme. Add after heat processing if active protease is required, or validate the residual activity after the actual process.

Bromelaine is stored in a humid room
Moisture accelerates caking and activity loss. Store in a dry controlled area with tightly closed packaging.

Open drum shows lower activity than sealed drum
Repeated humidity and temperature exposure can degrade activity. Use smaller packs or controlled dispensing where frequent opening is required.

Activity result differs between internal and supplier laboratory
The methods may use different substrate, pH, temperature or basis. Align the test procedure before investigating product quality.

Customer wants guaranteed therapeutic effect from raw Bromelaine
Raw-material activity does not establish clinical efficacy. Therapeutic use requires evidence and the appropriate medicinal or healthcare regulatory 
framework.

Burn-treatment use is proposed with ordinary Bromelaine powder
Do not substitute food or supplement enzyme powder for regulated topical debridement medicine. Clinical products have specialized composition, dosing and administration.

FREQUENTLY ASKED QUESTIONS

What is Bromelaine?
Bromelaine is another spelling of bromelain, a pineapple-derived proteolytic enzyme preparation.

What is the common English name?
Bromelain.

What is the generic CAS Number?
9001-00-7 for the bromelain enzyme preparation recognized in food regulation.

Does Bromelaine have one molecular formula?
No. It is a protein-enzyme preparation rather than one small molecule.

Does Bromelaine have one molecular weight?
No. Commercial Bromelaine is an enzyme mixture; purified major stem bromelain is commonly around the mid-20-kDa range.

What plant is Bromelaine derived from?
Pineapple, principally Ananas comosus.

Is Bromelaine derived from the stem or fruit?
Both exist. Stem bromelain is the principal commercial source, while fruit bromelain is a distinct related enzyme.

What is the EC Number of stem bromelain?
EC 3.4.22.32.

What is the EC Number of fruit bromelain?
EC 3.4.22.33.

Why do some sources list EC 3.4.22.4?
It is an older or generic bromelain enzyme reference that appears in historical food-additive literature.

What type of enzyme is Bromelaine?
A cysteine protease / cysteine endopeptidase enzyme preparation.

What does Bromelaine do?
It hydrolyzes peptide bonds and breaks proteins into smaller peptides.

What is GDU?
Gelatin Digesting Unit, a common assay unit for Bromelaine proteolytic activity.

What is MCU?
Milk Clotting Unit, another traditional activity unit.

What are FCC Papain Units?
A protease-activity measurement used in some enzyme and natural-health-product specifications.

Can GDU and MCU be compared directly?
Only approximately. Exact comparison depends on the assay conditions and should be based on validated methods.

Why is activity more important than milligrams?
Equal powder weights can have different proteolytic strength, so enzyme activity determines functional performance.

What is Bromelaine used for in food?
Protein hydrolysis, meat tenderization, texture modification and other enzyme-processing functions.

Is Bromelaine GRAS in the United States?
21 CFR 184.1024 affirms bromelain for food enzyme use under current good manufacturing practice.

Does the U.S. regulation set one maximum food level?
No. The regulation limits use by current good manufacturing practice.

What is the JECFA INS number?
INS 1101(iii).

What is the JECFA ADI?
The historical evaluation lists ADI not limited, with use limited by good manufacturing practice.

Is there a completed EU Union list of authorized food enzymes?
No. The European Commission currently states that the Union-list evaluation process is still ongoing.

Can Bromelaine be used in dietary supplements?
Yes, subject to the supplement rules and quality requirements of the target market.

Is Bromelaine used medically?
Specialized bromelain-containing medicinal products exist, including regulated topical burn-debridement therapy, but ordinary food-grade powder is not interchangeable with those products.

Can Bromelaine cause allergies?
Yes. Pineapple-related allergy and occupational respiratory sensitization to bromelain have been reported.

Is enzyme dust a workplace hazard?
Yes. Repeated inhalation of protease dust can cause respiratory sensitization and asthma.

How should Bromelaine be stored?
Cool, dry, tightly sealed and protected from heat, moisture and contamination according to the current TDS and SDS.

Is Bromelaine stable in water?
It is generally less stable in aqueous solution than as dry powder, so working solutions are often prepared close to use.

Can Bromelaine be heated?
Heat increases reaction rate initially but excessive or prolonged heating denatures the enzyme and destroys activity.

What documents should be checked before use?
Use the current Ataman Chemicals TDS, SDS and COA for the exact activity grade and intended food, supplement, pharmaceutical or technical application.

FINAL TECHNICAL SUMMARY

Bromelaine is the French- and European-market spelling commonly used for bromelain, a pineapple-derived proteolytic enzyme preparation.
Generic bromelain food-enzyme preparation is widely identified by CAS Number 9001-00-7.
The commercial ingredient is not one single small molecule and therefore has no fixed molecular formula or universal molecular weight.
Stem bromelain is principally classified as EC 3.4.22.32, while fruit bromelain is EC 3.4.22.33.

Older food-additive references can also use the historical generic EC 3.4.22.4 designation.
Bromelaine activity is commonly specified by GDU/g, MCU/g, FCC PU/g, CDU/g, FIP units or another validated protease assay.
Activity units should not be compared numerically without considering the analytical method.
The principal biochemical function is hydrolysis of peptide bonds in proteins and polypeptides.
Major commercial uses include meat tenderization, protein hydrolysis, food processing, dietary supplements, research and regulated specialty pharmaceutical enzyme applications.
U.S. regulation 21 CFR 184.1024 affirms bromelain as a food enzyme used to hydrolyze proteins or polypeptides under current good manufacturing practice.
JECFA identifies bromelain as INS 1101(iii) and historically lists an ADI not limited with use controlled by good manufacturing practice.

European food-enzyme regulation remains in an evaluation and Union-list development process, so commercial use should follow the current applicable EU and national rules.
Bromelaine is a protein enzyme and can lose activity through heat, extreme pH, humidity and prolonged aqueous storage.
Dry powder should be stored cool, dry and tightly sealed to preserve activity.
Powder handling requires strong dust control because bromelain is an established occupational respiratory sensitizer capable of causing allergic rhinitis and asthma.
Individuals with known pineapple or related protease allergy require particular caution.
Food, supplement, pharmaceutical and research grades are not automatically interchangeable.

For Bromelaine activity grades, food-enzyme and supplement specifications, GDU/MCU/FCC PU requirements, TDS, SDS, COA and commercial supply, contact Ataman Chemicals with the intended application, source preference, activity specification, dosage basis, microbiological requirements and regulatory market.

Ataman Chemicals
Phone: +90 216 577 10 10
Email: info@atamankimya.com