TruCarnitine Powder provides a 2:1 ratio of L-Carnitine-L-Tartrate and Choline Bitartrate, based off the research showing the importance of choline in combination with carnitine in order to get the benefits of L-Carnitine supplementation. Each serving provides 3g of this combination, with 30 servings per bottle. As always, every bottle is third-party tested for quality and purity.