A new scientific work was a response to information distributed on the Internet regarding the effects of vitamin D on coronavirus.
Scientists from Europe and the US are warning against the use of high doses of vitamin D for the prevention of COIVID-19. They formulated their attitude to the problem in a conciliation document, which was published in BMJ Nutrition, Prevention and Health. Their article was a response to unproven claims circulating on the Internet that high (above 4000 IU) doses of vitamin D reduce the risk of coronavirus infection.
The authors of the article claim that the available scientific evidence does not mean that vitamin D can prevent COVID-19 or help treat this disease. When supplementing with vitamin D, they recommend adhering to official guidelines.
“An adequate level of vitamin D in the body is crucial for health. Too low a risk of rickets or osteoporosis, but an excess of vitamin A leads to an increase in the amount of calcium in the blood, which can harm the body, ”said Professor Sue Lanham-New from the University of Surrey.
According to scientists, claims that vitamin A may help in the treatment of COVID-19 are not supported by adequate human studies.
Scientists have analyzed previous studies that conclude that hypovitaminosis D is associated with a risk of acute respiratory infections. They found a lot of limitations in these studies. For example, most of this data was obtained in developing countries. They cannot apply to countries with higher incomes due to differences in external factors that affect people.
Even if there is a link between vitamin D and respiratory infections, it does not prove that high doses of vitamin A will help in prevention and treatment. Today, reliable information is only available on the harmful effects of vitamin D in excessive dosages.
“Most of the vitamin D in our body is formed by sunlight. But it can be really difficult for many people, including those on self-isolation, to get enough vitamin, ”says Professor Carolyn Greig, professor at the University of Birmingham. She noted that doses of vitamin D supplements should be in line with national guidelines.
Scientists remind that vitamin D can be obtained from food: it is found, for example, in fish, red meat, egg yolks, and in vitamin-fortified foods.
According to Russian recommendations, for people over 50 to prevent vitamin D deficiency, it is recommended to receive at least 800-1000 IU of vitamin a day, at the age of 18-50 years, the normal dose of vitamin is 600-800 IU per day.