Fat Fighter’s active ingredient, Neopuntia®, is derived from the prickly pear cactus, and it is the most powerful, gluten-free, kosher, and vegetarian fat-binding ingredient on the market today. Its natural fibers have lipopholic properties, binding to the fat from your foodsin the stomach. As a result, some of the fat from your foods is not absorbed by the body, but rather excreted from your system naturally.