What are the reasons for menopause at the age of 40?

Patient's question:

Main symptoms: Onset time: August 2009 Laboratory test results: No abnormalities

Doctor's answer:

Analysis of the condition: Menopause at the age of 40 is a bit early, as it generally occurs between 48-50 years old.
Suggestions: With improved living conditions, if the diet is well-balanced, it should not be this early, but it's not guaranteed.
Lifestyle care: It's best to eat more blood-boosting foods, such as red dates and goji berries. Most women have some degree of anemia.