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Protein

Measured in g · macronutrient

Protein is a macronutrient made of amino acids, measured in grams.

Why it matters

Protein contributes to the maintenance of muscle and other tissues. Requirements differ between individuals.

Top food sources

Highest published foods per 100 g. Values are source-traceable (USDA FoodData Central).

See the full highest-protein foods ranking →

Frequently asked questions

What is Protein?
Protein is a macronutrient made of amino acids, measured in grams.
What foods are highest in Protein?
Among the foods in Foodatron, the richest sources of Protein per 100 g include Soy protein isolate, Spirulina, dried, Peanut flour, defatted, Cottonseed flour, partially defatted, Dried whole egg. The full ranked list is on this page.
What is Protein measured in?
Protein is measured in g. Foodatron shows every food's Protein per 100 g edible portion.
Why is Protein important?
Protein contributes to the maintenance of muscle and other tissues. Requirements differ between individuals.

Educational information only — not medical or dietary advice for any individual. See our methodology.