Pre work out ritual. You can stack L-Carnitine with caffeine-containing supplements as part of your pre-workout ritual. Since it's stimulant-free, it pairs well with coffee, Nobi Nutrition Green Tea Fat Burner Supplement, or your other favorite pre-workout supplement. Stimulant free. L-Carnitine has been shown in numerous studies to support weight loss and aid in muscle preservation during training, making it a powerful, stimulant free weight loss supplement for men and women. Faster workout recovery. Many athletes notice a significant boost in their performance when they supplement with L-Carnitine. They also experience better muscle gains and have an easier time getting back into the gym after difficult workouts improving recovery. Increase fitness performance. In order for the L-Carnitine to enter the muscle cells and do its job, insulin levels need to be elevated. Taking L-Carnitine when insulin is elevated also helps to deliver more glucose to the muscle cells. This, in turn, helps to boost energy and workout performance. Support weight loss. L-Carnitine works by transporting fatty acids from food into the mitochondria of the cell. There, they are converted into energy. This will prevent muscle failure, fatigue, and that sluggish feeling many people experience, especially during a dieting phase.