What sets them apart structurally is the branched side chain in their molecular makeup, which is also why they're metabolized differently from other amino acids
L-carnitine Side Effects and Precautions Since L-carnitine is a naturally occurring chemical, produced by the body and found in a variety of food sources, it is generally considered safe and has no real side effects or dangers
No dosage adjustment is needed for patients with renal impairment, though renal function should be monitored in patients experiencing severe adverse gastrointestinal reactions
They are convenient and effortless: simply apply them to clean, dry skin and let them work throughout the day
Evans M, Evans W, Godbeer F, Edgar L, Spaepen E, Davies AL