Effects of l carnitine supplementation on weight loss and body composition: A systematic review and meta analysis of 37 randomized controlled clinical trials with dose response analysis ScienceDirect 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 Machine learning guided discovery of SLC25A45 as a mediator of mitochondrial methylated amino acid import and carnitine synthesis: Cell Metabolism Species and muscle differences in L carnitine levels in skeletal muscles based on a new simple assay ScienceDirect