Bromelain

enzymealpha-L-Fucp-(1->3)-[alpha-D-Manp-(1->6)-[beta-D-Xylp-(1->2)]-beta-D-Manp-(1->4)-beta-D-GlcpNAc-(1->4)]-D-GlcpNAc

What is it

Bromelain is a mixture of proteolytic (protein-digesting) enzymes derived from the stem and fruit of the pineapple plant (Ananas comosus). It is used to support digestion, reduce inflammation and swelling after injury or surgery, and aid recovery from minor musculoskeletal complaints.

How it works

Bromelain consists primarily of cysteine proteases that break peptide bonds in proteins. When taken with meals, it acts in the digestive tract to help break down dietary protein. When taken between meals, a portion is absorbed intact into the bloodstream, where it exerts systemic effects on inflammation and clotting. The anti-inflammatory mechanisms of bromelain include reduction of pro-inflammatory cytokines, modulation of bradykinin and prostaglandin levels, and inhibition of platelet aggregation. These effects underlie its traditional and clinical use for swelling, bruising, sinusitis, and post-surgical inflammation. Bromelain potency is measured in gelatin digesting units (GDU) or milk clotting units (MCU) rather than weight alone, since activity varies between preparations. Higher activity products are typically more clinically useful at lower weight doses.

Evidence for 5 uses

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Post-surgical swelling and bruising

Grade B

Good evidence

Multiple trials support bromelain (typically 500-1,000 mg/day) for reducing swelling, bruising, and pain after dental, sinus, and nasal surgery. Reasonable evidence for similar effects after minor orthopedic procedures.

Sinusitis / nasal congestion

Grade B

Good evidence

Bromelain has been studied for acute and chronic sinusitis, with evidence supporting modest reductions in symptom duration and severity. Used as adjunct to standard care.

Osteoarthritis

Grade C

Moderate evidence

Some studies and combination products (e.g., bromelain plus rutin and trypsin) suggest possible benefit for osteoarthritis pain comparable to NSAIDs, with fewer GI side effects. Evidence is mixed.

Sports injuries / muscle soreness

Grade C

Moderate evidence

Bromelain may reduce inflammation and accelerate recovery from minor sports injuries. Evidence is limited but mechanism is plausible.

Digestive support

Grade C

Moderate evidence

Bromelain helps digest dietary protein in the gut. Useful in pancreatic insufficiency or when paired with high-protein meals. Evidence in healthy adults is more anecdotal.

3 commercial forms

Bromelain (standardized by GDU or MCU)

Activity varies by preparation; check potency units rather than just mg.

The standard form. Higher GDU/g products are typically more clinically useful.

Enteric-coated bromelain

Designed to bypass stomach acid; some evidence of better systemic absorption.

Preferred when targeting systemic anti-inflammatory effects rather than digestion.

Bromelain in combination (with trypsin, rutin, etc.)

Some clinical research uses combination enzyme blends.

Used in branded products like Phlogenzym for inflammation and joint support.

Dosage

Typical supplement doses are 200-2,000 mg/day, divided into 2-3 doses, with potency of 1,200-2,400 GDU/g. For digestion, take with meals. For systemic anti-inflammatory effects, take between meals on an empty stomach. The DSLD shows bromelain in over 11,000 supplement labels. No formal UL; doses up to several thousand mg/day appear well-tolerated short-term.

When and how to take it

For digestive support, take with meals. For systemic anti-inflammatory effects (swelling, bruising, sinusitis), take on an empty stomach at least 30-60 minutes before meals or 2 hours after, so the enzyme is absorbed intact rather than digesting food. Split daily dose into 2-3 administrations.

Food sources

Food	Amount	%DV
Fresh pineapple (1 cup)	Naturally rich in bromelain (especially the core)	—
Pineapple core	Most concentrated natural source	—

Safety

Bromelain is generally well-tolerated. Side effects can include GI upset, diarrhea, increased menstrual flow, and allergic reactions (especially in those allergic to pineapple, latex, bee venom, or grass pollens). Bromelain may modestly thin blood and increase bleeding risk, so caution is needed perioperatively.

Who should be cautious

Avoid in active bleeding disorders or before surgery (stop 2 weeks prior). Caution with anticoagulants and antiplatelet drugs. Avoid in pineapple, latex, bee venom, or grass pollen allergies due to cross-reactivity risk. Avoid in pregnancy due to potential effects on uterus and bleeding. Caution in peptic ulcer disease.

Interactions

May potentiate anticoagulants and antiplatelet drugs (warfarin, aspirin, clopidogrel), increasing bleeding risk. May enhance absorption of certain antibiotics (tetracyclines, amoxicillin) and sedatives. Theoretically increases absorption of other medications by affecting gut permeability. May potentiate chemotherapy in some cases.

Frequently asked questions

Should I take bromelain with food or empty stomach?⌄

With food: helps digest dietary protein. On empty stomach: more enzyme is absorbed intact for systemic anti-inflammatory effects. Choose timing based on your goal.

Will bromelain help my surgery recovery?⌄

Reasonable evidence supports bromelain for reducing post-surgical swelling and bruising, especially for dental, sinus, and minor procedures. Stop 1-2 weeks before surgery to avoid bleeding risk, then resume after as directed by your surgeon.

Can bromelain help with sinusitis?⌄

Yes, with reasonable evidence. Bromelain is often used as an adjunct to standard sinusitis care to reduce inflammation and symptom duration.

Is bromelain safe with blood thinners?⌄

Bromelain mildly thins blood, so combining with warfarin, aspirin, or other antiplatelet drugs raises bleeding risk. Consult your prescriber before combining.

How do I read bromelain potency?⌄

Look for GDU (gelatin digesting units) or MCU (milk clotting units) per gram. A typical effective dose might provide 600-2,400 GDU, regardless of total mg.

References

Bromelain - Wikidata — Wikidata link

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Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you're pregnant, breastfeeding, on medications, or managing a chronic condition.