This so-called Chili oil is called "Chili slimming cream", which is a transparent paste with a pungent smell. Many cosmetics stores in Nanjing have this kind of "pepper slimming cream" packaged in red plastic pipes. Generally, a tube of 200 ml packaging costs tens of dollars. The raw material is natural pepper.

Li Qingtian, a professor in the Department of Health Care and Nutrition of Nanjing Medical University, said that "Chili to lose weight" has no scientific basis. Pepper can make the skin turn red and hot, and accelerate the local metabolism, but this effect can't last more than twice. Because capsaicin has quickly excreted substance P, the skin will no longer be red and hot, and naturally it will not achieve the effect of losing weight. "Pepper slimming cream" is capsaicin extracted from pepper. The concentration of capsaicin is higher, which may make people's skin allergic.