1, the effect of a single product is limited: the weight loss effect of a single product is often limited, because it is impossible to completely solve many problems in the weight loss process, and only relying on one product to lose weight will rebound after stopping using it.

2. Health damage: Some weight-loss products contain harmful ingredients. Long-term use will lead to health problems. When these health problems accumulate to a certain extent, it will lead to a rebound in weight loss.