Losing weight is harmful to your health, so you must be careful. First of all, losing weight may lead to malnutrition, because dieters may eat insufficient nutrition, thus affecting the normal development and operation of the body. Secondly, losing weight may lead to the lack of vitamins and minerals in the body, which are essential to the health and normal operation of the body. In addition, excessive weight loss may also lead to water shortage in the body, dehydration symptoms, affecting the normal operation of the body. Finally, excessive weight loss may lead to lack of sleep and affect the normal operation of the body. In a word, losing weight is harmful to your health. Be careful not to lose too much weight, so as not to affect your health.