Amino acid

Amino acids are organic compounds comprise mainly from the elements carbon (C), hydrogen (H), oxygen (O), and nitrogen (N), although other elements are found in the side chains of certain amino acids. Because of their biological significance, amino acids are important in nutrition and are commonly used in nutritional supplements, fertilizers, and food technology. Industrial uses include the production of drugs, biodegradable plastics, and chiral catalysts.

ME/CFS
Several studios have altered serum levels of amino acids in ME/CFS patients, including lower level of branched chain amino acids (BCAA) during exhaustion and recovery and lower levels of long chain amino acids (LNAAs) during recovery. Other studies have found normal plasma amino acid levels at rest.