What You Need to Know
During fermentation, fish-derived proteases and halotolerant microbes hydrolyze proteins into free amino acids, peptides, and volatile sulfur compounds. The resulting broth contains high levels of glutamic acid, which imparts umami, along with other amino acids and amines that contribute to its complex flavor profile.
The Science
Primary Reaction
Proteolytic hydrolysis of fish proteins by fish enzymes and microbial proteases