What You Need to Know
The high salt concentration creates an osmotic gradient that draws water from the mushroom tissue, lowering water activity to ≤0.85 and inhibiting microbial growth. Simultaneously, cell lysis releases glutamic acid and 5′‑nucleotides (IMP, GMP, AMP), which combine to produce a pronounced umami flavor. The resulting seasoning is stable, dry, and can be stored for months under cool, dry conditions.
The Science
Primary Reaction
Osmotic dehydration coupled with enzymatic release of glutamates and nucleotides