9-PAHSA (Item No. 17037) is a newly identified endogenous lipid that belongs to a collection of branched fatty acid esters of hydroxy fatty acids (FAHFAs). It is found in wild-type and AG4OX mice, as well as humans, and is reduced in the serum and adipose tissues of insulin-resistant humans.{27644} 9-PAHSA improves glucose tolerance, stimulates insulin secretion, and has anti-inflammatory effects in mice.{27644} 9(S)-PAHSA is the S enantiomer of 9-PAHSA. There are no published reports on the activity of this enantiomer.