What You Need to Know
The curing process relies on osmotic dehydration, where high salt concentrations draw water out of the fish or eggs, lowering water activity and inhibiting microbial growth. Simultaneously, the oil or brine creates an anaerobic barrier that protects lipids from oxidation, while the pH drop to 5.5–6.0 further suppresses spoilage organisms.
The Science
Primary Reaction
Osmotic dehydration and lipid oxidation inhibition