We discovered that acute lysine ingestion at reasonable doses (i.e., 2 or 5 g) has no favorable influence on endogenous glucose Ra, endogenous glucose Rd, glucose AUC, insulin AUC or ISI/M in older, overweight people. Second, there may be an age-related resistance to a lower dose of lysine ingestion with respect to glucose metabolism as in the case for muscle protein synthesis response.

A) Discrimination factors of NSD1 for the recognition of amino acid residues at the positions next to the target lysine (K36 in the experiment shown here).

In an effort to replicate, the herpes virus requires arginine , another amino acid that is common in foods and essential to human life