Those slimming consultants who find it useful are all psychological effects. In fact, they hire someone to supervise the weight loss. If they have self-control, as long as they eat less and exercise more, they can actually lose weight in a few months. There are also those slimming products, some of which are metabolized by drugs but not good for the body, some of which suppress appetite, some promote excretion, and some are toxic to the body. Others, such as meal replacement, actually let you control your diet, so if you have the financial conditions.