Frontiers Advances in cardiovascular supplementation: mechanisms, efficacy, and clinical perspectives Propionyl L carnitine dilates human subcutaneous arteries through an endothelium dependent mechanism ScienceDirect The effects of L carnitine supplementation on cardiovascular risk factors in participants with impaired glucose tolerance and diabetes: a systematic review and doseresponse meta analysis Diabetology & Metabolic Syndrome Springer Nature Link Propionyl L carnitine Corrects Metabolic and Cardiovascular Alterations in Diet Induced Obese Mice and Improves Liver Respiratory Chain Activity PLOS One