you have to get the right one!


  • There are 5 types of vitamin D, classified from 1 to 5.
  • Vitamin D helps to increase the concentration of calcium and phosphorus in the blood.
  • Excess vitamin D can cause hypercalcemia, which is an excess of calcium in the blood.

Vitamin D is essential for our bodies, but not all vitamin D is created equal. This is the conclusion of a published study Frontiers of immunology. Its authors, British researchers from the Universities of Surrey and Brighton, were interested in two types vitamin D : D2 and D3. They compared their effects human health.

Where does vitamin D come from?

The vitamin D is essential for good bone health, but is also involved in nerve transmission, hormone regulation and function immune cells. It is found in food: fatty fish, dark chocolate, egg yolk, dairy products, etc. Sun exposure for 15-20 minutes with sunscreen is also important. Different types of vitamin D come from different sources: vitamin D3 is produced naturally by the skin through exposure to the sun or artificial light, while vitamin D2 comes from certain plants and mushrooms.

Vitamin D3, an ally of the immune system

For this study, the researchers recruited 335 participants who were divided into three groups: the first received a daily dose of 15 micrograms of vitamin D2, the second received the same dose of vitamin D3, and the last placebo. The study lasted twelve weeks. Scientists have observed the effects of different types of vitamin D on genes. They found that they did not have the same consequences: vitamin D3 has a modifying effect Immune systemwhich can strengthen the body against viral and bacterial diseases.We have shown that vitamin D3 stimulates the body’s type I interferon signaling system, a key part of the immune system that provides the first line of defense against bacteria and viruses.explains Colin Smith, lead author of the study. Thus, a healthy intake of vitamin D3 can help prevent viruses and bacteria from gaining a foothold in the body.

The effect of vitamin D2 has not been proven

On the other hand, they believe that the effects of vitamin D2 on human health are questionable. “The small effect we saw in our review of vitamin D2 means that a larger study is urgently needed to clarify these differences in effect. points out study co-author Susan Lanham-New. However, these results suggest that vitamin D3 should be the preferred form of fortified foods and supplements.Between the lack of brightness characteristic of winter and the pandemic Covid-19, which has led to increased time spent indoors, British researchers recommend taking supplements or foods rich in vitamin D3. in france,National Health Protection Agency recommends taking supplements only for those who are deficient. For others, she offers to face The sunfor example, exercising outdoors and eating foods rich in vitamin D.

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