Acetyl L Carnitine HCl Swanson Vitamins L Carnitine L Tartrate 500mg Veg Capsules Pure Nutrition Buy L CARNITINE 500mg Supplement Converts Fat into energy, Helps to Boos cellular energy Promotes weight loss, Quick muscle recovery. NutriJa Supplement Store Polycystic Ovary Syndrome (PCOS): Symptoms & Nutritional Strategies. Life Extension L Carnitine has become one of the most commonly asked about supplements over the past 18 months and I can see why when looking at all the research that has come out about it over the last 2ish years.,