Hair loss is often related to deficiencies in vitamins such as vitamin A, vitamin B, and trace elements including iron, zinc, and calcium. It is also related to the lack of nutritional factors, such as a deficiency in high-quality protein, which can lead to hair loss. Hair loss can be associated with many factors, including nutrition, diet, neurological and mental factors, as well as certain diseases including endocrine disorders and immune system diseases that can cause hair loss. Therefore, when experiencing hair loss, it's important to carefully analyze the reasons, and visit a hospital to determine the specific causes. If the cause is a deficiency in trace elements and vitamins, appropriate supplements should be provided. If it is caused by diseases, timely treatment of the primary disease is necessary. In terms of diet, it is also important to consume foods rich in protein and vitamins.