Compounded Carnitine (L) Injection Empower Pharmacy 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 What is L carnitine? Reducing fatigue Life Extension Europe Meet L Carnitine a naturally occurring amino acid that plays a key role in helping the body convert fat into usable energy. It works by transporting fatty acids into your cells to L CARNITINE