Case of 24 Acetyl L Carnitine 400 mg Cap 30 By Nature's Bounty USA L carnitine is a naturally occurring amino acid structure that is made in the human brain, liver, and kidneys. L carnitine plays a critical role in energy production, as it converts fat into energy. The Effects of L Carnitine Supplementation on Weight Loss, Glycemic Control, and Cardiovascular Risk Factors in Patients With Type 2 Diabetes: A Systematic Review and Dose response Meta Analysis of Randomized Controlled Trials Clinical Short chain fatty acids in control of body weight and insulin sensitivity Nature Reviews Endocrinology Frontiers Ameliorating effects of L carnitine and synbiotic co supplementation on anthropometric measures and cardiometabolic traits in women with obesity: a randomized controlled clinical trial