Vitamin D Alone Cannot Treat Or Prevent COVID-19, Suggests N
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Take a vitamin D supplement throughout the autumn and winter to maintain bone and muscle health, according to the National Institute of Health Care Excellence (NICE), Public Health England (PHE), and the Scientific Advisory Committee on Nutrition (SACN).

On 28 November PHE and NICE put out guidance that adults, young people, and children over four years should consider taking a daily supplement containing 10 µg of vitamin D between October and early March because people do not make enough vitamin D from sunlight in these months. Some groups of people should consider taking a supplement throughout the year if they have little or no sunshine exposure.

The panel agreed that low vitamin D status was associated with more severe outcomes from covid-19. The serum concentration of vitamin D falls during a systemic inflammation which may occur during severe covid-19 illness and it is difficult to know if low vitamin D status causes poor outcomes or vice versa.

In June 2020, SACN conducted a rapid review which concluded that there was insufficient evidence to determine whether vitamin D supplementation could have a role in preventing respiratory tract infections. In the new rapid review reported a modest protective effect of vitamin D supplementation compared with placebo for respiratory tract infections.

Paul Chrisp, director of the Centre for Guidelines at NICE, said, “While there is insufficient evidence to recommend vitamin D for the prevention or treatment of covid-19 at this time, we encourage people to follow government advice on taking the supplement throughout the autumn and winter period.

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