Oxyenergy's L Carnitine. My go to pre post workout supplement. take it Pre workout for energy production. take it Post workout to reduce exercise fatigue. Note: Do NOT take more than Carnitine 1000 Nutrex Supports Diet L Carnitine) is often understood to aid in weight loss. Although the benefits of L carnitine are scientifically proven, it helps reduce fat mass, increase muscle mass, and reduce fatigue. Therefore, understanding what L carnitine Nutrex Liquid L Carnitine 3000 465ml