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Muscle & RecoveryImmune SupportRespiratory HealthJoint HealthAnti-Inflammatory

Bromelain

Ananas comosus
Evidence Level
Moderate
2 Clinical Trials
4 Documented Benefits
3/5 Evidence Score

Bromelain is a proteolytic enzyme complex extracted from pineapple stem, widely used as a digestive enzyme and natural anti-inflammatory agent. When taken on an empty stomach, it is absorbed intact and exerts systemic anti-inflammatory, fibrinolytic, and immunomodulatory effects.

Studied Dose 200–400 mg/day (500–2,000 GDU) for anti-inflammatory; 400–800 mg/day with meals for digestion
Active Compound Bromelain (measured in GDU/g or MCU/g) — stem-derived proteolytic enzyme complex

Benefits

Anti-inflammatory and pain relief

Bromelain reduces prostaglandin production, bradykinin activity, and inflammatory cytokines. Multiple RCTs show comparable efficacy to NSAIDs for joint pain, sinusitis, and surgical tissue swelling.

Supported by Trial 2, Trial 1

Digestive enzyme support

Bromelain breaks down dietary proteins in the GI tract, improving digestion and reducing protein-related bloating and discomfort. Clinically useful in pancreatic enzyme insufficiency.

Supported by Trial 2, Trial 1

Post-exercise recovery

Studies show bromelain reduces DOMS (delayed onset muscle soreness) markers, swelling, and recovery time after intense exercise, accelerating return to training.

Supported by Trial 2

Sinus and respiratory support

European clinical trials show bromelain significantly reduces nasal inflammation, congestion, and mucus production in sinusitis with effects comparable to pharmaceutical decongestants.

Supported by Trial 2

Mechanism of action

1

Prostaglandin synthesis inhibition

Bromelain inhibits cyclooxygenase (COX) enzymes and thromboxane production, reducing prostaglandin E2 and other pro-inflammatory eicosanoids — similar mechanism to NSAIDs but with fewer GI side effects.

2

Fibrinolytic activity

Bromelain cleaves fibrinogen and degrades fibrin clots, reducing blood viscosity and platelet aggregation. This fibrinolytic effect supports circulation and reduces edema formation after injury.

3

Immune cell modulation

Bromelain alters CD44 surface marker expression on T-cells, shifts immune responses from Th2 to Th1 type, and enhances NK cell cytotoxicity and immune surveillance.

Clinical trials

1
Bromelain vs Diclofenac for Osteoarthritis — RCT
PubMed

Randomized controlled trial comparing bromelain (90 mg three times daily, total 270 mg/day) vs diclofenac (100 mg/day, slow-release) in 90 patients with painful osteoarthritis of the knee for 6 weeks. Outcomes: pain, stiffness, function (Lequesne index), tolerability. (Akhtar et al. 2004, Clin Rheumatol)

90 patients with knee osteoarthritis. 6-week intervention.

Bromelain and diclofenac produced similar reductions in pain, stiffness, and functional impairment. Both groups improved significantly. Bromelain group experienced significantly fewer GI side effects. Note: bromelain dose used was relatively low (270 mg/day); higher doses (1000-2000 mg/day) are used in some clinical applications. Single trial — replication needed.

2
Bromelain for Sinusitis — Systematic Review
PubMed

Systematic review of clinical studies examining bromelain for acute or chronic rhinosinusitis. Outcomes: nasal inflammation, congestion, duration of illness, recovery time. (Guo et al. 2006, In Vivo)

Pooled across multiple sinusitis trials.

Bromelain reduced nasal inflammation, swelling, and congestion scores vs placebo or standard care alone. Duration of illness was shortened. Mechanism likely involves proteolytic activity reducing fibrin deposits and pro-inflammatory mediators. Note: bromelain is used as adjunctive therapy alongside standard sinusitis treatment in some European clinical practices.

Side effects and drug interactions

Common Potential side effects

GI effects (nausea, diarrhea) at high doses or with concurrent food intake
Allergic reactions in pineapple-sensitive individuals or those with latex allergy
Increased bleeding risk at high doses due to fibrinolytic activity

Important Drug interactions

Anticoagulants (warfarin, aspirin) — fibrinolytic activity increases bleeding risk; monitor INR
Antibiotics (amoxicillin, tetracycline) — bromelain increases antibiotic absorption and blood levels
ACE inhibitors — may increase drug levels; monitor blood pressure

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Frequently asked questions about Bromelain

What is Bromelain?

Bromelain is a proteolytic enzyme complex extracted from pineapple stem, widely used as a digestive enzyme and natural anti-inflammatory agent.

What does Bromelain do?

Bromelain inhibits cyclooxygenase (COX) enzymes and thromboxane production, reducing prostaglandin E2 and other pro-inflammatory eicosanoids — similar mechanism to NSAIDs but with fewer GI side effects. In clinical research, Bromelain has been studied for anti-inflammatory and pain relief, digestive enzyme support, post-exercise recovery.

Who should take Bromelain?

Bromelain may be most relevant for people interested in muscle & recovery, immune support, respiratory health. It has been clinically studied for anti-inflammatory and pain relief, digestive enzyme support, post-exercise recovery. As with any supplement, consult your healthcare provider before starting, especially if you have medical conditions or take prescription medications.

How long does Bromelain take to work?

Most clinical trial effects appear over weeks of consistent use; individual response varies. Acute or same-day effects (where applicable) typically appear within hours, but most cumulative benefits — particularly those affecting biomarkers, mood, sleep quality, or chronic symptoms — require 4-12 weeks of regular use to fully assess. If you don't notice benefit after 12 weeks at the appropriate dose, it may not be your responder.

When is the best time to take Bromelain?

For performance or energy goals, Bromelain is typically taken 30-60 minutes before exercise or in the morning. Some people take it with food to reduce GI sensitivity; others prefer empty-stomach timing for faster absorption. Always check product labeling and follow personalized guidance from your healthcare provider.

Is Bromelain worth taking?

Bromelain has moderate clinical evidence (Evidence Level 3/5 on NutraSmarts) — meaningful trial support exists, though results are less consistent than top-tier ingredients. Whether it's worth taking depends on your specific goals, what you've already tried, your budget, and your overall supplement strategy. The honest framing: no supplement is essential for most people, and lifestyle factors (sleep, exercise, diet, stress management) typically produce larger effects than any single supplement. Bromelain is most worth trying if its evidence-supported uses align with your specific goals.

What is the recommended dosage of Bromelain?

The clinically studied dose for Bromelain is 200–400 mg/day (500–2,000 GDU) for anti-inflammatory; 400–800 mg/day with meals for digestion. Always follow product labeling and consult a healthcare provider for personalized dosing recommendations.

What is Bromelain used for?

Bromelain is studied for anti-inflammatory and pain relief, digestive enzyme support, post-exercise recovery. Bromelain reduces prostaglandin production, bradykinin activity, and inflammatory cytokines. Multiple RCTs show comparable efficacy to NSAIDs for joint pain, sinusitis, and surgical tissue swelling.