In this fat-burning coffee of Professor Yan, there are three flavors, namely black tea caramel macchiato, mocha coffee and vanilla coffee. Adding L-carnitine can promote fat metabolism and promote fatty acids to enter mitochondria for oxidative decomposition, so it has a good effect on weight loss. Mct is also added, which can significantly reduce the proportion of body fat, effectively reduce the subcutaneous fat area of waist and abdomen, and improve the level of lipoprotein, with high safety and no need to worry about side effects.