Genji Burn Capsules Reviews: Fat burning capsules are supplements that are purported to help people lose weight by increasing the body's natural ability to burn fat. They usually contain ingredients like green tea extract, caffeine, and various plant-based extracts that are said to promote fat burning and weight loss. The manufacturers of these supplements claim that their pills can help you burn fat without changing your lifestyle or diet, however, there is no scientific evidence to support such claims.