High doses of vitamin D supplementation has no current benefit in preventing or treating Covid-19

Scientists from the UK, Europe and the USA, including experts from the University of Birmingham, have published a vitamin D consensus paper warning against high doses of vitamin D supplementation. According to the study, there is currently insufficient scientific evidence to show vitamin D can be beneficial in preventing or treating Covid-19. Its authors advise that the population adhere to Public Health England guidance on supplementation. Following unverified reports that high doses of vitamin D (higher than 4000IU/d) could reduce the risk of contracting Covid-19 and be used to successfully treat the virus, the new report published in the journal BMJ, Nutrition, Prevention and Health , investigated the current scientific evidence base on the vitamin and its use in treating infections. Vitamin D is a hormone, produced in the skin during exposure to sunlight, and helps regulate the amount of calcium and phosphate in the body, which are needed to keep bones, teeth and muscles healthy. Professor Sue Lanham-New, Head of the Department of Nutritional Sciences at the University of Surrey and lead author of the study, said: "An adequate level of vitamin D in the body is crucial to our overall health, too little can lead to rickets or the development of osteoporosis but too much can lead to an increase in calcium levels in the blood which could be particularly harmful.' Examining previous studies in this field scientists found no evidence of a link between high dose supplementation of vitamin D in helping to prevent or successfully treat Covid-19 and cautioned against over supplementation of the vitamin, without medical supervision, due to health risks.
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