title: Letter: Protein requirement.
mesh_terms: D000328:Adult; D002648:Child; D002664:Child Nutritional Physiological Phenomena; D002675:Child, Preschool; D003906:Developing Countries; D004044:Dietary Proteins / Q000600:supply & distribution; D006801:Humans; D007223:Infant; D007227:Infant Nutritional Physiological Phenomena; D009747:Nutritional Physiological Phenomena; D009751:Nutritional Requirements; D011502:Protein-Energy Malnutrition / Q000517:prevention & control
chemical_list: D004044:Dietary Proteins