35-55 grams per day
||Human Homo sapiens
||Michael A. Savageau, 1983, Escherichia coli Habitats, Cell Types, and Molecular Mechanisms of Gene Control, The American Naturalist, Vol. 122, No. 6, (Dec., 1983), pp. 734
||Nixon SE, Mawer GE. The digestion and absorption of protein in man. 2. The form in which digested protein is absorbed. Br J Nutr. 1970 Mar24(1):241-58.PubMed ID5424261
||Intestinal contents, collected from the human jejunum after a test meal (milk-protein, gelatin or low-protein) were fractionated by centrifugation and gel filtration on G-75Sephadex. The fractions were hydrolysed and the proportion of the total amino acid in each fraction was determined. The amino acids were measured with an EEL Amino Acid Analyser.
||Endogenous protein is more resistant than dietary protein and continues to be autodigested throughout the remainder of the small intestine