Heat unfolds them and they link to each other: they bind, they firm, they build crust. They are one half of the Maillard reaction; sugar is the other.
Every protein has its own threshold and none of them are reversible. Egg turns at 82 °C, meat at 70, fish at 55 — once past, there is no coming back.
The white albumin that weeps out of salmon is a sign of too much heat, not of freshness: above 60 °C the muscle fibres contract and squeeze the protein out from between them. Pull it at an internal 50–52 °C and it never appears.
How to keep it, and who it suits.
Two days on ice in the fridge, three months frozen. To be eaten raw it must have been frozen at −20 °C for at least 24 hours: cold removes the parasite risk, freshness does not.
The flesh contains no gluten; check the cure on smoked products.
Allergen: FISH
This ingredient carries no meaningful carbohydrate, so it has no glycaemic index. On its own it will not move blood sugar; what you eat alongside it decides that.
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