When to take L carnitine: Dosage, forms, and side effects Nature's Lab CoQ10 200 mg + Alpha Lipoic Acid + Acetyl L Carnitine, 120 Vegetarian Capsules Costco If you are like a lot of people, you may have never heard of carnitine but this important nutrient is critical for our body's ability to optimally burn fat required for energy. How Much L Carnitine for Male Fertility? The 101 Guide L Carnitine 3000, Strawberry Watermelon, 15.72 fl oz (465 ml) LeanShots Liquid L Carnitine Shot (3000mg)