What Are L Carnitine Injections Used For? Supplements and chronic pain: What does the research say? Some studies suggest possible benefits for: Acetyl L Carnitine (energy for cells; studied in diabetic nerve pain) Alpha Lipoic Acid (antioxidant; may ease nerve pain, L Carnitine Injection Levocarnitine IV Weight Loss Supplement for Dogs and Cats Rooted Owl Rooted Owl Pet Supplements Benefits of L Carnitine in Ramadan 1. Supports Energy During Fasting L Carnitine helps transport fat into cells to be used as energy. This can be useful during long fasting hours Amazon.com: Swanson Propionyl L Carnitine with Glycine Natural Supplement Promoting Heart Health & Energy Support May Support Muscle Strength & Endurance (60 Veggie Capsules) : Health & Household