Using Vitamin D as a treatment for coronavirus could cut deaths by 60% a new study has found.
An MP called for hospitals to start using it as a Covid-19 remedy "immediately" after research conducted in Spain.
It 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, the results of which were published in the Social Science Research Network, were randomly assigned as either recipients of the calcifediol treatment or as controls on admission.
The patients received five doses of the vitamin in increasing intervals of two, four, eight and 15 days.
The results show that Covid-19 patients given the Vitamin D doses were 80% less likely to need intensive care treatment. The University of Barcelona also concluded that "adjusted results showed a reduced mortality of more than 60%" for people who received the treatment.
Though the research is preliminary and still awaiting peer review, the results showed that 36 of the 551 patients treated with calcifediol died from Covid-19, compared to 57 patients out of 379 in the control group.
Researchers found only five per cent of the calcifediol group were admitted to the critical care units.
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Tory MP and former Brexit Secretary David Davis called for Vitamin D to be used in UK hospitals "immediately".
He wrote on Twitter: "The findings of this large and well-conducted study should result in this therapy being administered to every Covid patient in every hospital in the temperate latitudes.
"Furthermore, since the study demonstrates that the clear relationship between vitamin D and Covid mortality is causal, the UK government should increase the dose and availability of free vitamin D to all the vulnerable groups.
"These approaches will save many thousands of lives. They are overdue and should be started immediately."
The study said: "In this open randomised study conducted during the first European outbreak of the deadly Covid-19 pandemic, we have observed that, in hospitalised Covid-19 patients, treatment with calcifediol reduced the requirement for critical care by more than 80%.
"This supports the conclusion of a prior pilot trial in Cordoba in which calcifediol treatment led to a reduction of more than 50% of ICU admission in hospitalised Covid-19 patients."
Health Secretary Matt Hancock previously said the link between Vitamin D and the Covid was being "kept under review" as studies began to demonstrate those with low levels have a higher chance of death.
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