Lowering the secretion of androgen can prevent androgenetic alopecia, but it has no preventive effect on other types of hair loss. Hair loss is only a symptom, there are many causes of hair loss, such as malnutrition, scalp ringworm, seborrheic dermatitis, androgenetic alopecia, endocrine disorders, etc. If it is androgenetic alopecia, lowering the secretion of androgens can prevent hair loss; however, lowering the secretion of androgens for other types of alopecia can not prevent the role of hair loss. It is recommended to go to the hospital for checkups to identify the causes of hair loss, and then take appropriate treatment measures, and it is not recommended to use drugs blindly.