title: Effect of varying energy and protein intake on nitrogen balance in adults engaged in heavy manual labour.
abstract: 1. The effect of varying energy and protein intake on nitrogen balance in adult men engaged in heavy manual labour was investigated. 2. Low protein and energy levels resulted in negative N balance and urea index (Waterlow, 1963) was decreased. 3. Urinary excretion of hydroxyproline was found to be sensitive to dietary protein level, but not to energy.
mesh_terms: D000293:Adolescent; D000328:Adult; D000596:Amino Acids / Q000097:blood; D003404:Creatinine / Q000378:metabolism; D004032:Diet; D004044:Dietary Proteins / Q000378:metabolism*; D002149:Energy Intake; D006801:Humans; D006909:Hydroxyproline / Q000652:urine; D008297:Male; D009584:Nitrogen / Q000378:metabolism*; D005082:Physical Exertion; D014508:Urea / Q000652:urine
chemical_list: D000596:Amino Acids; D004044:Dietary Proteins; D014508:Urea; D003404:Creatinine; D009584:Nitrogen; D006909:Hydroxyproline