Graphical representation of the individual values for fractional mixed muscle protein synthesis rates (FSR), calculated using plasma L-[<i>ring</i>-²H₅]phenylalanine enrichments as the precursor pool, in healthy young and elderly men in the post-absorptive state (<i>n</i> = 34 young and <i>n</i> = 72 elderly) and following the ingestion of 20 g protein (post-prandial; <i>n</i> = 35 young and <i>n</i> = 40 elderly).

<p>Graphical representation of the individual values for fractional mixed muscle protein synthesis rates (FSR), calculated using plasma L-[<i>ring</i>-²H₅]phenylalanine enrichments as the precursor pool, in healthy young and elderly men in the post-absorptive state (<i>n</i> = 34 young and <i>n</i> = 72 elderly) and following the ingestion of 20 g protein (post-prandial; <i>n</i> = 35 young and <i>n</i> = 40 elderly).