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The sunshine hormone, vitamin D, is in the spotlight once again as a potential coronavirus treatment.
Debates over the benefits of this age-old substance to treat Covid have raged for months, but they’ve intensified this week after the striking results of a Spanish trial.
Yet as the findings are met with further scepticism, it remains unclear how much closer we are to approving a safe, cheap and potentially highly effective defence against Covid-19.
The trial in question, published by the Social Science Research Network, involved 930 Covid patients hospitalised in the wards of the Hospital del Mar in Barcelona. Upon admission, 551 of the group received an intensive dose of calcifediol – a vitamin D metabolite. The remaining 379 patients acted as a control group.