Last reviewed May 2026 · 1 min read
Is Pepsin vegan?
Also known as: Porcine pepsin
Not Vegan
Derived from animals — avoid.
See all non-vegan ingredients →
No — Pepsin is commercially extracted from the stomach linings of pigs.
01 · The basics
What is Pepsin?
A digestive enzyme that breaks down proteins, commercially used as a processing aid in cheesemaking and to modify proteins in foods.
02 · The source
Where it comes from
Pepsin is commercially extracted from the stomach linings of pigs. As it is directly harvested from an animal, it is never vegan.
03 · Alternatives
Best vegan alternatives
Fungal protease
Check Price on AmazonPapain (from papaya)
Check Price on AmazonBromelain (from pineapple)
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Frequently asked
FAQ
Are digestive enzyme supplements containing pepsin vegan?
No. Any supplement that lists pepsin as an ingredient is not vegan because it is derived from pig stomachs. Vegans should look for supplements with plant-based or microbial enzymes like bromelain, papain, or fungal protease.
Is pepsin a type of rennet?
Pepsin can be a component of animal rennet, which is a complex of enzymes used to curdle milk for cheesemaking. However, vegan and vegetarian cheeses use non-animal rennet from microbial or plant sources instead.
Commonly found in
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Calcium Gluconate
A firming agent and acidity regulator.
Chitin
A fibrous substance consisting of polysaccharides, used in agriculture, winemaking, and dietary supplements (for weight loss).
Chitosan
A linear polysaccharide derived from chitin, heavily marketed in supplements as a 'fat binder' for weight loss.
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