Frontiers Modulation of Perturbed Cardiac Metabolism in Rats Under High Altitude Hypoxia by Combination Treatment With L carnitine and Trimetazidine L Carnitine 3000 mg Ampules 25 ml LCarnitine Safety High Doses Consensus Long term effects of L carnitine on : European Journal of Gastroenterology & Hepatology Neither L Carnitine nor Berberine work like caffeine, yohimbine, or fat burners. They do NOT: Spike your heart rate Jack up your nervous system Cause jitters or crashes Mask When to Take L Carnitine for Optimal Training Benefits Transparent Labs