SmartEquine Acetyl L Carnitine Powder J&B Pet Source 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 Acetyl L Carnitine (ALCAR) Supplement for Horses Mad Barn 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, L Carnitine Paste Premarket Pet Products