1, heart disease: vitamin D plays a key role in regulating cell reproduction - cancer patients lack this regulatory mechanism. Therefore, by preventing cell overpopulation, vitamin D can prevent some cancers.

2. Diabetes: In type I diabetes, the immune system kills the body's own cells. Scientists believe that vitamin D can act as an immunosuppressant. They believe it may prevent the immune system from overreacting.

3, high blood pressure: Vitamin D is utilized by the parathyroid glands on the thyroid gland in the neck. These glands secrete a hormone that regulates calcium levels in the body, and calcium helps regulate blood pressure.

4, rickets and osteoporosis: Vitamin D can strengthen bones and prevent rickets in children and osteoporosis in the elderly.

Expanded:

Symptoms of Vitamin D deficiency:?

1, dry skin?

Vitamin D is known as the sunshine vitamin. Sunlight is good for cells to make vitamin D. The longer the skin is exposed to sunlight, the more vitamin D it produces, and the more supple the skin is, the better it is able to withstand external damage. A good complexion doesn't have to be a perfect bronze; healthy, hydrated skin is just as important. In conditions where there is a lack of sunlight, misuse of moisturizers during the winter months is more likely to result in vitamin D deficiency.

2, sluggishness?

Vitamin D is good for promoting the functioning of the immune system, and a lack of vitamin D will inevitably lead to fatigue. If you're feeling sluggish, there's no doubt that it's due to a lack of vitamin D. Seasonal fatigue occurs in winter due to a lack of sunlight and vitamin D. But there's no need to take cod liver oil. However, there is no need to take cod liver oil, as long as you eat more foods rich in vitamin D, you can be energetic through the winter.

People's Daily News - Vitamin D makes your brain more flexible! What nutrients are needed in 7 major parts of the body

People's Daily Online - Vitamin D plays many roles Less sunlight or need to supplement