Chemically the N-di-isopropyl derivative of glucuronic acid. Claimed to be an antioxidant, and to speed recovery from fatigue. Sometimes called vitamin B15, but there is no evidence that it is a dietary essential, nor that it has any metabolic function.
Pangamic acid is a substance commonly marketed as vitamin B15 or dimethylglycine. Its actual identity in some preparations is not clear, since many chemicals have been marketed as pangamic acid or vitamin B15. As reviewed by Antonio and Stout, well-designed studies do not support the use of pangamic acid as an ergogenic aid.