Ingredient Spotlight: L Carnitine Source: Biosynthesised in the body from the amino acids Lysine and Methionine, L Carnitine is a conditionally essential nutrient involved in energy metabolism and fat transport. Key Benefits 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 Want to level up your fat loss game? Results don't just come from training they come from strategy. GNC L Carnitine supports your body's natural fat metabolism so you can train harder, PCOS Nutrition Center L Carnitine (120 Capsules) Liquid Carnitine 3000 Maximum Strength Fat Burner Gaspari Nutrition USA