Supplementation for more than a week with L carnitine has the potential to increase carnitine in horses' muscles. This increase could improve the transportation of fatty acids into mitochondria to be used for Should I Take Acetyl L Carnitine or L Carnitine HealthAid Acetyl L Carnitine Confident Health NEW! Boost your horse's energy, stamina, and recovery with EnduraBoost! This concentrated performance supplement, enriched with L carnitine, provides that extra boost when your horse needs it. With the added benefit of Postbiotics, Mitochondral Injection 100ml Boost Sprint & Endurance Performance for Horses L Carnitine Benefits, Sources, and Side Effects