Bromelain
Ananas comosus (bromelain complex)
TL;DR
Bromelain is a pineapple-derived proteolytic enzyme with reasonable evidence for reducing post-surgical swelling and bruising, and moderate evidence in knee osteoarthritis and acute sinusitis. Taken between meals it acts systemically; taken with meals it simply digests protein.
Ideal For
- Post-surgical or post-dental swelling and bruising
- Sports soft-tissue injury recovery
- Acute sinusitis as an adjunct
- Knee osteoarthritis, as a secondary option
Avoid If
- Taking warfarin or other anticoagulants
- Pineapple or latex allergy
- Within two weeks of scheduled surgery unless surgeon-directed
- Active peptic ulcer
Frequently Asked Questions
Overview
Bromelain is one of the rare supplements where timing changes what the product actually is. Taken with a meal, the enzymes stay in the gut and break down dietary protein — useful for some people with protein-heavy diets or low enzyme output, but nothing more. Taken on an empty stomach, a measurable fraction is absorbed intact and produces systemic effects: reduced oedema, faster resolution of bruising, and modulation of inflammatory mediators. The systemic use is where the interesting trial data sit, particularly in oral and dental surgery, sports injury and sinusitis. Potency is expressed in activity units (GDU or MCU) rather than milligrams, and two products with identical milligram labels can differ several-fold in actual enzymatic activity, which is a persistent source of confusion when comparing doses across studies.
How It Works
- Reduces bradykinin, limiting vascular permeability and swelling
- Fibrinolytic activity clears fibrin that traps tissue oedema
- Modifies leukocyte surface receptors, reducing migration into inflamed tissue
- With food, acts purely as a protein-digesting enzyme
Quick Facts
- Timing determines whether it is a digestive or systemic agent
- Potency is measured in GDU, not milligrams
- Strongest data are post-surgical swelling and bruising
- Cross-reacts with latex and pollen allergies
Benefits & Outcomes
Sinus Relief
Bromelain reduces sinus swelling and shortens symptom duration in several controlled trials.
Post-Workout Recovery
Well supported for surgical swelling, weakly supported for ordinary training soreness — most useful after a real soft-tissue injury.
Supporting Research8 studies
Bromelain as an adjunctive treatment for moderate-to-severe osteoarthritis of the knee: a randomized placebo-controlled pilot study
Brien S, Lewith G, Walker AF +3 more
Bromelain was no better than placebo for WOMAC pain, stiffness or function in moderate-to-severe knee osteoarthritis, and dropout was high in both arms.
Bromelain as an adjuvant in acute rhinosinusitis: a systematic review
Guo R, Canter PH, Ernst E
Bromelain trials reported faster resolution of nasal inflammation and mucosal swelling, but methodological quality was mostly poor
Efficacy and safety of bromelain: A systematic review and meta-analysis
Leelakanok N
Bromelain may be effective against sinusitis but was not effective for cardiovascular diseases.
A review of the use of bromelain in cosmetic surgery
Ley CM, Tsiami A, Ni Q +1 more
There is insufficient high-quality evidence to conclude that bromelain reduces post-surgical bruising and swelling.
Potential role of bromelain in clinical and therapeutic applications
Rathnavelu V, Alitheen NB, Sohila S
Bromelain shows fibrinolytic and anti-oedema activity used for bruising and swelling.
Efficacy of proteolytic enzyme bromelain on health outcomes after third molar surgery: systematic review and meta-analysis of randomized clinical trials
de la Barrera-Nunez MC, Yanez-Vico RM, Batista-Cruzado A +1 more
Pooled trials showed bromelain reduced postoperative swelling and trismus after third molar surgery, with smaller and less consistent effects on pain.
The effects of bromelain on osteoarthritis symptoms: A systematic review
Asgari Savadjani S, Yadollahi F, Khaghani A
Across included trials, bromelain reduced pain and improved function in mild-to-moderate osteoarthritis, but effects were absent in more severe disease and trial quality was variable.
Bromelain-Rich Pineapple Extract for the Treatment of Pediatric Patients With Orchiepididymitis: A Randomized Clinical Pilot Study
Colletti A, Sangiorgio L, Martelli A +1 more
A rapid regression of edema was observed in the active group after 1 week and at the end of the study.
Safety Information
Potential Side Effects
Usually mild: nausea, diarrhoea, and occasional increase in menstrual flow. Allergic reactions occur in people sensitised to pineapple, latex, or grass and birch pollen through cross-reactivity.
Contraindications
Discontinue before elective surgery unless a surgeon has specifically prescribed perioperative use. Avoid with anticoagulant therapy.
Drug Interactions
- Warfarin and antiplatelet drugs — increased bleeding risk
- Amoxicillin and tetracyclines — bromelain increases their serum levels
- Sedatives — theoretical potentiation reported
Pregnancy & Breastfeeding
Pregnancy: likely_unsafe
Breastfeeding: insufficient_data
Dosage Guidelines
Dosage Used in Studies
200-2000 mg
Best Time to Take
Between meals for systemic effect; with meals for digestion
Best Form
Standardised by GDU (aim for 2,000+ GDU/g) rather than by milligram weight
Bioavailability
Only a small fraction is absorbed intact, but enough to produce measurable plasma proteolytic activity; enteric coating and empty-stomach dosing both improve it.
Forms Compared
Capsule standardised in GDU
Enteric-coated
Combination enzyme blend
Food & Timing
At least 30-60 minutes before or 2 hours after food for anti-inflammatory use. With the first bite for digestive use.
Medical Disclaimer
The information provided on this website is for educational and informational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition or before starting any supplement regimen.
Individual results may vary. The statements on this website have not been evaluated by the Food and Drug Administration. Products and information are not intended to diagnose, treat, cure, or prevent any disease.