1. can't supply enough nutrition, long-term use will affect health and easily lead to muscle consumption.

2. Return to a normal diet, and your weight will get back easily.

3. It can lead to menstrual disorder for two reasons:

Insufficient fat. On the one hand, it shows that the body fat tissue content is insufficient, on the other hand, it shows that the dietary intake of fat is too small.

Nutritional anemia. Women who lose weight irregularly for a long time often have pale skin, dizziness, shortness of breath, irritability, decreased attention and irregular menstruation, which is the performance of iron deficiency and anemia in the body.

Therefore, it is best not to lose weight during menstruation, which is called slimming welfare period. The usual dieting habits can be relaxed, and foods rich in iron and fiber, such as spinach, kelp, fish, grapes, etc., can be supplemented by moderate exercise. In addition, daily hydration is also quite effective. However, don't take advantage of this time to eat and quit. Things with high sugar and oil should still be rejected.