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Enzyme

Papain

Papain is a protein-splitting enzyme obtained from the milky latex of unripe papaya fruit.

Immune SupportGut HealthHair & Skin

What it is studied for

The strongest rated effects first. Bars show the size of the effect, the letter grades the evidence, and each rating lists the studies behind it.

InflammationSmallCNo linked study
Immune SupportSmallCNo linked study
Microbiome healthGut HealthSmallCNo linked study
Bloating & gas reliefGut HealthSmallCNo linked study
Skin InflammationHair & SkinSmallCNo linked study
Gut healthSmallCNo linked study
Every rating with its studiesGrouped by health goal, with the publications behind each rating

What is papain?

Papain is a protein-splitting enzyme obtained from papaya. EFSA’s assessed food-enzyme preparation comes from the milky latex of unripe fruit; latex production declines as the fruit ripens. 1

Why people take it

Essential Health20.4%
Immune Support19%
Gut Health17%
Detox11.8%
Energy10.7%
Bone & Joint4.8%

SuppCo community snapshot, 2026-09-28. Reasons for use are not evidence that it works.

Questions people ask

Is papain the same as papaya?

No. Papain is an enzyme obtained from the plant; a papaya preparation contains more than an isolated enzyme. 1 2

Does food-use safety establish a supplement dose?

No. EFSA evaluated particular food-processing uses and exposure levels, not a dose for treating indigestion. 1

Does the FDA action mean all papain products were banned?

No. The action described by FDA targeted unapproved topical drug products, not every food or supplement containing papain. 3

Sources