Papain: Papaya's Proteolytic Enzyme & Its Uses

Papain is a cysteine protease extracted from the latex of unripe papaya fruit. It's one of the oldest known plant enzymes, used for centuries in traditional cuisines as a meat tenderizer and in folk medicine for digestive support. Modern research has explored its applications in digestion, wound care, and protein analysis.

Digestive Applications

Papain breaks down proteins across a broad pH range, making it effective in both the acidic stomach and the more alkaline small intestine. It's commonly included in digestive enzyme blends, sometimes alongside bromelain, to provide comprehensive protein digestion support.

Topical & Other Uses

Papain-based wound debridement products have been used in healthcare to remove dead tissue from wounds (though some formulations have been removed from the US market). In the laboratory, papain is widely used for tissue dissociation and protein research.

For the broader category of enzymes used beyond digestion, see Proteolytic Enzymes.