Proteins

Nutrition for Everyone: Protein

Centers for Disease Control and Prevention.
MedlinePlus: Dietary Proteins

DHHS. NIH. National Library of Medicine.

Find the latest news, plus links to overviews, clinical trials and research related to dietary proteins. Also in Spanish.
USDA Nutrient Database List for Protein

USDA. ARS. Nutrient Data Laboratory.

Find out the protein content in common foods, sorted either alphabetically by food description (PDF|212 KB) or in descending order by nutrient content (PDF|226 KB) in common household measures.
MedlinePlus: Protein in Diet

DHHS. NIH. National Library of Medicine.

Includes general definition, function, food sources, and recommendations for protein in the diet. Also in Spanish.