When to Take L Carnitine for Optimal Training Benefits Transparent Labs Bandini L Carnitine 3000, 180 Capsules with Carnipure High Dose, Sports Supplement with L Carnitine Tartrate, Pure Carnitin with High Absorption and Bioavailability, Vegan and No Additives : Amazon.com.be: Health & Personal Care L Carnitine 6000 Liquid (1000 ml) Extra High Dose with 6000 mg Pure L Carnitine per Daily Serving Amino Workout Drink Delicious Taste Vegan Wehle Sports (1000 ml, Cherry): 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