no rebound. Buzz bullet-proof coffee contains certain nutrients, such as caffeine, which can promote human metabolism and help to consume calories and fat in the body, thus reducing weight and not rebounding. Buzz bullet-proof coffee is a special coffee drink, which is made of low-toxic herbs and has the effect of burning fat for a long time and improving cognitive ability. Buzz bullet-proof coffee uses a lot of butter and MCT oil instead of milk and sugar to increase energy and improve satiety.