Acetyl L Carnitine When Should You Take L Carnitine? MuscleTech If you are like a lot of people, you may have never heard of carnitine but this important nutrient is critical for our body's ability to optimally burn fat required for energy. Spring Valley Acetyl L Carnitine HCI 400 mg + Alpha Lipoic Acid 200 mg Capsules, 50 Count HSA FSA Eligible Walmart.com NAC N Acetyl L Cysteine EVLUTION NUTRITION L CARNITINE 350 MG ( L CARNITINE ) 20 HARD GELATIN CAPSULES