GAT SPORT L CARNITINE L Carnitine injection is recommended at 1 ampule every 2 3 days for best results. The L Carnitine is taken intravenously either by normal injection or using a butterfly needle. After taking this L Carnitine, you Acetyl L Carnitine (ALCAR) Supplement for Horses Mad Barn Buy L Carnitine Capsules 2050 mg per Serving ESN Amazon.com: VMI Sports L Carnitine 3000 Liquid 3000 mg Carnitine Supplement Zero Calorie Zero Sugar Keto Friendly for Men and Women Great Tasting 31 Servings (Peach Mango, 16 fl. oz.) : Health & Household