31 Servings. Go further, longer with Liquid L-Carnitine 3000 Liquid Fat Burner from Nutrakey. Nutrakey believes the best way to Make Life Better is through wellness, health and happiness. With their clean products, with no artificial color or dyes, they look to always provide the most high quality products on the market at a great price. Nutrakey loves watching their customers succeed and grow, and love to hear success stories. They consider their costumers as “partners” in business.