Vitamin D, a sterol derivative, has anti-rickets effect, also known as anti-rickets vitamin. At present, it is considered that vitamin D is also a steroid hormone, and the most important members of vitamin D family are VD2 and VD3. Vitamin D is the derivative of different provitamin D after ultraviolet irradiation. Plants do not contain vitamin D, but provitamin exists in both animals and plants.
Vitamin D is a fat-soluble vitamin with five compounds, among which vitamin D2 and vitamin D3 are closely related to health. They have the following three characteristics: it exists in some natural foods; 7- dehydrocholesterol produced from cholesterol is stored under the skin of human body, which can be transformed into vitamin D3 after being irradiated by ultraviolet rays. Proper sunbathing is enough to meet the human body's needs for vitamin D.
A 40-year study by American scientists found that taking a dose of vitamin D every day can reduce the risk of breast cancer, colon cancer and ovarian cancer by half. When sunlight shines on the skin, the body will produce vitamin D, which accounts for 90% of the body's vitamin D supply.
Cancer experts say that the evidence about the anti-cancer effect of this "sunshine vitamin" is very sufficient, and the public health department must take urgent action to improve the level of vitamin D in people's bodies. In recent years, more and more evidence shows that the lack of vitamin D may be extremely harmful to the health. It is believed that the formation of diseases such as heart disease, lung disease, cancer, diabetes, hypertension, schizophrenia and multiple sclerosis are closely related to the lack of vitamin D.
Long-term use of these four drugs will "take away" body nutrition-People's Network