There are calls for hospitals to start using Vitamin D "immediately" to treat Covid-19 patients, after a study claimed it reduces deaths from the virus by 60 per cent.
Former Brexit Secretary, MP David Davis, said the findings, published by the Social Science Research Network, are part of a "very important study".
The research looked at the effectiveness of using calcifediol - a Vitamin D3 - when treating more than 550 people on coronavirus wards of the Hospital del Mar in Barcelona, Spain.
Those who took part in the trial were randomly assigned as either recipients of the calcifediol treatment or as controls on admission.