Diurnal variations in plasma aminoacid concentrations. I) Effect of dietary protein intake on rhythm of neutral aminoacids.
The effect of dietary protein content on the diurnal variations in plasma neutral amino acid levels was studied in normal human subjects. For 3 consecutive 5-day periods, subjects consumed diet containing 0-or 75 or 150 g of protein per day. Blood samples were drawn at 4-hr intervals on the 4th and 5th days of each period. Consumption of the protein-free diet caused plasma concentration of all amino acids in the late morning and afternoon, while the 150 g protein diet elicited increases in these levels during the daytime. Ingestion of the diet containing 75 g protein tended to diminish the amplitude the daily rhythms.
D000328:Adult; D000596:Amino Acids / Q000097:blood*; D002940:Circadian Rhythm; D004044:Dietary Proteins / Q000494:pharmacology*; D006801:Humans; D008297:Male
D000596:Amino Acids; D004044:Dietary Proteins