l-carnitine healthline 500 mg -Carnitine L-Carnitine
Description
S.ObeidS.KlingenbergR.GencerB.MachF.RaberL.et al (2017)

Borzelleca, J

Mixed with a good diet and exercise, it's great

Others find they arent actually eating enough, and eating more improves their capacity

A total of 35 subjects were enrolled in the heavy-isotopologue challenge studies, which included either d 9 -BB or d 3 -l-carnitine