Berberine vs L Carnitine , Which one should YOU take?, Both are metabolic powerhouses, but they work in completely different ways , Berberine HCL is natures metformin., 1. Activates AMPK (your cells Acetyl L Carnitine Acetyl L Carnitine Capsules NOW Supplements Compounded Carnitine (L) Injection Empower Pharmacy L Carnitine helps your body turn fat into usable energy and plays a role in recovery, endurance, and even fertility., Your body does make it, and oral supplements are effective but injectable Understanding the Role of Carnitine in TPN and IDPN Therapy