The main raw material of bulletproof coffee is black coffee. Taking this bullet-proof coffee properly can really help us lose weight. Because this coffee can stimulate sympathetic nerve, secrete more gastric juice, promote gastrointestinal peristalsis, and accelerate the burning of fat in the body, thus achieving the effect of losing weight. Moreover, in bulletproof coffee, the caffeine contained in it can promote the metabolism of the body, and the calorie is relatively low, so the effect in weight loss is still worthy of recognition, and there will be no side effects of dizziness and brain swelling due to weight loss.