Bandini Acetyl L CARNITINE 1000mg (High Dose) Acetylcarnitine for Exercisers with High Physical Activity How Much L Carnitine Should I Take? A Guide The Science of Good Health Early research into L carnitine was often cited as underwhelming, showing negligible changes in muscle carnitine content and fat loss outcomes. However, these findings may have been limited by a short study window Acetyl L. Carnitine Supplement Metabolics Olimp Nutrition L Carnitine 3000 Extreme Shot Bodybuilding and Sports Supplements