What You Need to Know
The pounding ruptures papaya cell walls, liberating papain and juice that tenderize the fruit. Lime juice lowers pH to ~4.5–5.0, inactivating excess papain and inhibiting microbial growth. Fish sauce adds salt and umami peptides, while palm sugar provides sucrose that remains sweet without caramelization.
The Science
Primary Reaction
Mechanical rupture of papaya cells releasing papain and juice, acidification by lime, and salt-induced umami enhancement