Supplement Scholar
Compound

Pepsin

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Pepsin. Gastric protease.

How it works. Hydrolyzes proteins at acidic pH.

What the research supports. 1 graded claims. Strongest: Protein digestion support (moderate).

How much to take. Typical dose: 200 mg/meal.

Side effects and interactions. 1 medication interaction listed. No serious side effects listed at normal doses.

Stacking. Pairs well with Multi-strain probiotic, L-glutamine.

Common forms. Available as Capsule or softgel, Powder, Sublingual or buccal, Liposomal liquid.

Key studies. 8 studies cited. The strongest are listed with links to PubMed.

Community. Experiences from people who have tried Pepsin. Anecdotes are not medical advice.

Pepsin. Gastric protease.

No single structure

What it is

Gastric protease.

Food sources

Endogenously produced or biosynthesized moleculeStandardized pharmaceutical- or food-grade supplementCombined with cofactors that improve absorption or activity

How it works

Hydrolyzes proteins at acidic pH.

Pathways

  • Hydrolyzes proteins at acidic pH

Effects

  • +Protein digestion support supports

What the research supports

Protein digestion supportmoderate

Strong: consistent results across large trials or meta-analyses. Moderate: several trials, mostly positive. Limited: small or mixed studies. Preclinical: animal or cell research only.

Typical dose
200 mg/meal
TimingConsistent daily timing recommended; split larger doses if GI tolerance is a concern.
With foodWith a meal containing fat for fat-soluble compounds; otherwise either.
Best formMost evidence is based on the capsule or softgel form.
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Side effects & interactions

Common side effects

  • GI upset

Medication interactions

Prescription medications (general)minor

Always disclose Pepsin use to your prescriber — additive, antagonistic, or pharmacokinetic interactions are possible.

Check any supplement–medication combination with your pharmacist before starting.

Combines with

Pairs well

Common forms

  • Capsule or softgel
  • Powder
  • Sublingual or buccal
  • Liposomal liquid

Key studies

8 studies cited in total.

PubMed: Pepsin — Protein digestion support ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Pepsin and "Protein digestion support". Filter by RCT, meta-analysis, or year on the results page.

PubMed: Pepsin — randomized controlled trial ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Pepsin and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.

PubMed: Pepsin — meta-analysis ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Pepsin and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.

Discussion

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