Hello! Losing weight will make the hair lack sufficient nutrition. If the hair lacks iron intake, it will be yellow and dull, and the final result will inevitably be a lot of hair loss. In addition, hair loss has the following reasons:

1, endocrine disorder. Endocrine system regulates various physiological activities of human body to maintain normal state. When the human body's endocrine disorders, such as androgen imbalance, it is easy to cause hair loss.

2. Metabolic imbalance. A balanced metabolic structure can provide sufficient nutrition for hair and scalp and maintain the normal physiological growth process of hair. But if the metabolic system is out of balance, it will lead to a lot of hair loss.

3. Imbalance of immune regulation. When people's immunity is at a normal level, all human functions are in a normal state. When the immune regulation is unbalanced and the immune level is low, it is easy to produce immune alopecia.