Not reliable. The "fat separator" in the advertisement claims that it can make fat burn. In fact, it is impossible for fat to generate heat locally through physical methods such as massage and vibration, but this is only a physical process. And "fat burning" is a biological oxidation process in the body, which is carried out step by step under the catalysis of a series of enzymes. Physical methods can't make fat biochemical reaction. Therefore, the "skimmer" diet is unreliable and may even lead to spasmodic contraction of local soft tissues.