Assessment of protein requirements by nitrogen balance.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D001481:Basal Metabolism; D004044:Dietary Proteins; D005243:Feces / Q000032:analysis; D005260:Female; D005523:Food Supply; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D009584:Nitrogen / Q000032:analysis / Q000378:metabolism* / Q000652:urine; D009751:Nutritional Requirements; D011247:Pregnancy
D004044:Dietary Proteins; D009584:Nitrogen