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.
Prawns pass done in seconds: the flesh turns opaque at 55–60 °C and stops there; past 70 °C the collagen contracts and it turns to rubber. The measure is shape rather than colour — a loose "C" is cooked, a tight "O" is overcooked.
How to keep it, and who it suits.
Fresh prawns keep one day on ice in the coldest part of the fridge; raw frozen, six months at −18 °C. Once thawed they are not refrozen.
Shellfish contains no gluten; the risk is in breaded or sauced products.
Allergen: SHELLFISH
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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