MAD BARN Acteyl L Carnitine Performance & Energy Metabolism Horse Powder Supplement, 2.2 lb bag Chewy.com 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 is amino acid supplement that enhances energy production in performance horses. It works through 6 ways: Muscle level of L Carnitine influence the exercise capacity of a horse. L Shop L Carnitine Injection The Vet Shed L Carnitina 10 600x773 1 233x300.jpg