Codeage Liposomal L Carnitine 500 mg Supplement Free Form Amino Acid 90 Capsules Pharmacokinetics of L Carnitine Clinical Pharmacokinetics Springer Nature Link L carnitine is effective for both fat loss and athletic performance. However, oral L carnitine has lower bioavailability and can be harmful at high doses, so it should be avoided. , Even cardiologists 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