Species and muscle differences in L carnitine levels in skeletal muscles based on a new simple assay ScienceDirect l carnitine, a friend or foe for cardiovascular disease? A Mendelian randomization study BMC Medicine Springer Nature Link In a meta analysis of 21 RCTs, L carnitine supplementation improved several outcomes related to cardiometabolic health in people with type 2 diabetes. However, the certainty of the evidence and the clinical importance of Machine learning guided discovery of SLC25A45 as a mediator of mitochondrial methylated amino acid import and carnitine synthesis: Cell Metabolism