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 L Carnitine Acetyl L Carnitine (ALCAR) Supplement for Horses Mad Barn L Carnitine Dosage for Weight Loss: A Guide The Science of Good Health L Carnitine: Benefits, Side Effects, Sources, and Dosage iMuscles Nutrition