Unfortunately, the theory that some foods or supplements can burn fat is about as possible as turning back time. It turns out this theory is based on wishful thinking and not an ounce of science. From a physiological standpoint, it's impossible for foods to burn fat in the body. While it's true that foods contain caffeine can temporarily boost your metabolism, that's simply not enough to cause any trigger weight loss. The best way to lose weight and get rid of excess body fat remains the same- aside from taking the best diet pills, cutting back on calories and boosting your physical activity is still the best.