2.8. Serum Amino Acid and Insulin Resistance Measures
Serum concentrations of amino acids (total branched-chain amino acids, valine, leucine, isoleucine, alanine, and glycine) were measured by LabCorp using liquid chromatography/tandem mass spectrometry (LC-MS/MS) analysis. Serum glycA—a measure of protein levels and glycosylation states of several of the most abundant acute-phase proteins in serum [