Women lacking vitamin D are more susceptible to obesity

　　Vitamin D is necessary for the body to produce leptin. Leptin is a hormone that controls a person's appetite. It causes a person to feel full after a meal and thus stop eating. If the leptin content in the human body continues to decrease, the appetite will become larger and larger, making obesity more likely.

Main physiological functions of vitamin D
　　
1. Prevent the loss of amino acids through the kidneys ；

2. Increase the absorption of phosphorus through the intestinal wall and increase the reabsorption of phosphorus through the renal tubules ；

　　3. Maintain normal levels of citrate in the blood；

4. Promote growth and bone calcification, and promote healthy teeth ；

5. Improve the body's absorption of calcium and phosphorus, so that the levels of plasma calcium and plasma phosphorus reach saturation.

Sources of vitamin D: A few animal foods contain vitamin D, such as saltwater fish, egg . Milk and milk products also contain vitamin D. Butter, cod liver oil, and vegetable oils are also rich in vitamin D.