The results of a new study of geneticists from Brunel University in London (UK), published in the journal Nutrition, Prevention and Health BMJ.
In the midst of the second wave of the pandemic, recommendations emerged that high doses of vitamin D could protect against infection or reduce the risk of severe covid. These recommendations are based on the well-known fact that people with vitamin D deficiency are more likely to get sick and have more severe upper respiratory infections.
In addition, according to some studies, among patients who have died from covid, many people have low levels of this vitamin in their blood, which has boosted the popularity of vitamin supplements. However, whether there is in fact a causal relationship between vitamin D deficiency and severe covid remains unclear.
To understand this problem, researchers examined how a person’s genetic predisposition to high or low levels of vitamin D affects the risk of infection and the severity of the disease. In people of European descent, 17 genetic variants have been identified that are associated with a specific concentration of vitamin D in the blood.
When the scientists compared the frequency and course of the disease in the two groups (with genetically determined low and high levels of vitamins), no difference was found.
“We found no evidence that vitamin D deficiency could pose a high risk of coronavirus infection or affect its severity,” the researchers wrote.
However, scientists say they do not encourage people to stop taking vitamin D supplements, as they can have health benefits, especially in the absence of sunlight during the winter.
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