Abstract
In this paper, the change of concentration of the serum free amino acids by the dietary protein ingested was observed.Six healthy young men were selected as the subjects. The experimental period was divided into 2 stadia, the first being the vegetable meal period (protein 64gm/day, the protein score 50) and the second being the animal protein-rich meal period (protein 76gm/day, animal protein 54%, the protein score 89). Each period was run 4 days.The blood samples were obtained on the forth day of each period, before breakfast and 1 and 2 hours after meal. Eight essential amino acids in serum of each samples were determined by the microbiological method.The free amino acid levels in serum in fasting time showed no significant difference on the quality of protein ingested, whereas after meal it showed the discrepancy.
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