A 2016 study suggested L carnitine could drop a key cardiovascular risk marker by up to 12%, which sounded promising at first., But follow up research told a more complicated story, with inconsistent l Carnitine reduces reactive oxygen species endoplasmic reticulum stress and maintains mitochondrial function during autophagy mediated cell apoptosis in perfluorooctanesulfonate treated renal tubular cells Scientific Reports Role of L carnitine in female infertility Reproductive Biology and Endocrinology Springer Nature Link Analytical Method Development and Validation of Content of D Carnitine in Levocarnitine Using High Performance Liquid Chromatography L Carnitine Better Through Biology