Supplements
bromelain is safe at supplement doses
In plain terms: Is bromelain safe to take?
Part of: 🧪 bromelain
Generally safe, with a few real caveats: it can trigger reactions if you're allergic to pineapple, it mildly thins the blood (care with blood thinners and around surgery), and it can increase absorption of some antibiotics.
📅 Last reviewed: 2026-07-15 ⓘ
Evidence ladder
How far up the ladder this claim has climbed. A high consensus on a low rung means "consistent so far," not "proven in people."
Top evidence so far: Human trials (RCT / n-of-1)
How the studies fall
What the evidence shows
Generally safe and well-tolerated, with a few real caveats: people with pineapple allergy can react, it has mild blood-thinning activity (caution with anticoagulants and around surgery), and it can increase absorption of some antibiotics. Occasional GI upset otherwise.
The evidence (8)
| Source | Grade | Stance | Quality | Finding |
|---|---|---|---|---|
| Bernasinska-Slomczewska J et al 2026 · study_type: in-vitro | in-vitro | contradicts | moderate | Bromelain (0-120 µg/mL) tested on human peripheral blood mononuclear cells; low overall cytotoxicity, but 60 and 120 µg/mL triggered apoptosis (9.8% and 15.08%) and dose-dependent genotoxicity across 30-120 µg/mL (up to 16.0% comet-tail DNA |
| Rahimi-Movaghar E et al 2026 · study_type: RCT | RCT | supports | moderate | RCT, 60 patients, oral bromelain 1500 mg/day x15 days after Mohs skin flap surgery vs standard care; bromelain shortened suture removal by 2.6 days and improved healing scores. 'No major complications were reported.' |
| Hale 2004 · Int Immunopharmacol | mechanism | mixed | low | Study: oral bromelain is immunogenic (can raise antibodies) — a caveat to a blanket 'inert' safety claim. |
| Pavan 2012 · Biotechnol Res Int | observational | supports | low | Review: bromelain has a good safety record; caution with pineapple allergy and anticoagulants. |
| Emeka Godson A et al 2025 · study_type: animal | animal | supports | low | Rat neurotoxicity model, oral bromelain 5-15 mg/kg/day x14 days; study concludes 'lack of overt adverse effects support its translational potential as a safe, plant-based adjunct.' |
| Locci C et al 2024 · study_type: observational | observational | supports | low | Narrative review of bromelain use in children (MEDLINE/PubMed/EMBASE search); states bromelain 'is considered a safe nutraceutical' but notes clinical data in pediatrics remain limited (mostly in vitro/animal plus a few adult RCTs). |
| Majid OW, Al-Mashhadani BA 2014 · J Oral Maxillofac Surg | RCT | supports | low | Off-scope for safety. This 4-day, 45-patient third-molar trial declares its outcomes explicitly — 'The outcome variables were pain, swelling, and trismus, which were measured at 1, 3, and 7 days postoperatively. The other study variables included QOL measures to assess the patients' perception regarding the effect of surgery on their well-being and daily activities.' — and reports no adverse-event, tolerability, withdrawal or harm result anywhere in the readable text. The previous extract's 'comparable tolerability to diclofenac' has no anchor: the paper's only 'comparable' sentence is about efficacy, 'The effect was comparable between the 2 treatment groups for all parameters and at all intervals.' A 4-day course in 15 patients with no harms outcome reported is silence, and silence is not evidence of safety. Read from the PubMed abstract only; no PMC record, so a Results-section AE table cannot be positively excluded — re-open if full text is ever obtained. |
| Kumar 2023 · Food Funct | observational | supports | low | Review: bromelain is generally well-tolerated with low toxicity; caveats include allergy and antiplatelet activity. |
Disagree, or know a study we missed?
We grade by evidence, not opinions. The way to weigh in is to point us to a study we haven't cited (check the evidence table above first), or to flag a problem with one we have. Every submission is reviewed; if it holds up, the grade updates and shows in Science Changes Its Mind.
Opens a short form. You'll sign in with Google so submissions are tied to a real account — we don't display your identity, and we only accept a link we can verify (PubMed, DOI, ClinicalTrials.gov).
Educational only, not medical advice. Grades and scores reflect published evidence weighted by study design and quality; see the methodology.