When Should You Take L Carnitine? MuscleTech If you're putting in the work but the scale isn't moving, your body might just need a little help tapping into its fat stores. That's where L Carnitine comes in. It's not a Nutrex Research Liquid L Carnitine 3000, Stimulant Free Workout Drink, Passionfruit Guava Walmart.com Liquid L Carnitine 3500MG Boost Your Energy Naturally Ripped Up Nutrition Taking a preworkout AND carnitine? It is important to get the timing of each supplement right to get the best results with both. Watch as Phil explains the best way to combine them. , #preworkout