Whats the fastest way to gain muscle? Exercise is the most potent stimulus for muscle building, but these 3 supplements can significantly enhance the effects. Add these 3 muscle building supplements POV: You just found out L Carnitine is the to turning stubborn fat into energy (thanks, Dr. Berg ) But here's the twist: you don't just have to get it from Liquid L Carnitine 1000mg CoQ10 100mg Triple Strength L Carnitine Liquid 450 ml L Carnitine Explained: The Essential Guide to Energy, Metabolism, and Everyday Vitality