Do you need more vitamin D when there is less sunshine in winter? The answer is surprising

I believe that our readers who often read our popular science articles should already know that vitamin D is very important for us.

I believe that our readers who often read our popular science articles should already know that vitamin D is very important for us.

At present, the most well-known function of vitamin D is to ensure calcium homeostasis and regulate bone metabolism. In short, it is tomake our bones stronger;

In addition, a large amount of epidemiological data indicates that there is also a correlation between vitamin D concentration andcancer, infectious diseases, autoimmune diseases, and the risk of cardiovascular diseases.

Vitamin D is very important,

the main natural source depends on sun exposure

However, unlike other vitamins, vitamin D is found in very low amounts in most foods(fatty fish and mushrooms treated with ultraviolet light are exceptions),if we do not consider additional intake, the main natural source of vitamin D for the human body is skin synthesis.

When our skin is exposed to sunlight, ultraviolet rays can convert 7-dehydrocholesterol in the skin into vitamin D3 precursors through a non-enzymatic pathway. Vitamin D3 precursors undergo temperature-dependent rearrangement to form vitamin D3, but,due to differences in skin color, exposure area, latitude, season, and time of day, the amount of vitamin D produced by each exposure is not stable and is difficult to effectively quantify.

So when winter comes, the problem arises.