L Carnitine is Underrated. New Meta Review Reminds Us Why. When to Take L Carnitine for Weight Loss & Maximize Results L carnitine known as the energy nutrients, provides massive benefits to your heart and works best with Alpha Lipoic Acid. When Nicks in a calorie deficit, Acetyl L Carnitine is non negotiable., Why?, Helps convert fat into energy, Keeps the brain sharp, Supports endurance and focus, Cutting doesnt have to mean