Shrimp

Food · Animal Foods · Shellfish

Connected to · 2

food source · 2

Protein
Cooked shrimp has about 20–24 g of complete protein and only 1–1.5 g of fat per 100 g, so it delivers a lot of protein for its calories.
Mechanism · 2
Mechanism · Too lean to carry much oil
Shrimp is complete protein with very little fat, so its protein density per calorie is excellent. For the same reason it carries little omega-3: long-chain omega-3 travels mainly with fat, and shrimp has very little fat. Seafood does not automatically mean omega-3; how much it holds depends mainly on how fatty it is.
Numbers · The protein in a serving of shrimp
Per 100 g, cooked shrimp has about 20–24 g of protein and 1–1.5 g of fat, almost no carbohydrate, and about 85–100 kcal. A palm-sized portion of cooked shrimp weighs about 85 g and gives 17–20 g of protein. Boiling or steaming keeps it light; battering and frying can multiply the fat and calories several times over, and the extra comes from the coating and the oil, not the shrimp.
Iodine
Seafood is generally rich in iodine, and shrimp is a source too. Iodine is the raw material the thyroid uses to make its hormones, and every thyroid hormone molecule carries several iodine atoms.
Mechanism · 2
Mechanism · Iodine attaches to tyrosine
The thyroid uses a dedicated pump to pull iodine in from the blood against the concentration gradient, attaches it to tyrosine units on a large protein, and then joins two iodine-bearing tyrosines into a hormone. The numbers in T4 and T3 are the count of iodine atoms on the molecule. So iodine is not an add-on; it is part of the hormone molecule itself.
In practice · Enough, not more
Seafood is a reliable source of iodine, but reliable means enough, not the more the better: where salt is iodized, everyday intake is usually not short, and a large excess over a long time can also disrupt thyroid hormone production. The sodium in shrimp comes mostly from processing and dipping sauces, not from the shrimp itself.

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What shrimp is · eats like meat, profiles like lean fish

EVIDENCEGUIDE 1

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Shrimp is not low in cholesterol, but for most people, the cholesterol you eat raises in the blood (low-density lipoprotein, the "bad cholesterol" on a lab report) only modestly. The liver makes a little less in response, and shrimp has almost none of the saturated fat that pushes LDL up more. How that feedback works is covered in detail in the chapter on whether shrimp raises cholesterol.

Shrimp is a crustacean. Its muscle is almost pure lean protein, with very little fat. It eats like meat, but nutritionally it is closer to a very lean fish.

When you shop, the main differences are in three places: saltwater versus freshwater shrimp (broadly similar in nutrition); fresh versus frozen (frozen shrimp are often flash-frozen on the boat and may be no less fresh); and raw versus treated (salted, or soaked in phosphate to hold water) — treated shrimp can differ a lot in sodium and additives.

The head holds the hepatopancreas, which is rich in flavor and also where heavy metals and cholesterol are more concentrated. The dark line along the back is the gut and is usually removed. Raw shrimp is grayish, and it turns pink when heated because of a pigment called astaxanthin.

If you are allergic to crustaceans and your lips or throat feel tight, or you have trouble breathing after eating shrimp, call emergency services right away.

A grey-blue raw prawn with its head-thorax upper left and a segmented abdomen curving to the tail fan. — A CLOSER LOOK
Head and muscle are different
This identifies external regions; artwork cannot reveal internal organs, cholesterol or contaminants.

Educational content, not medical advice — consult a clinician.

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