But officials are still recommending Britons take the immune-boosting nutrient over the winter.
Health Secretary Matt Hancock ordered a rapid review into the vitamin s effect on Covid in October, after coming under fire for writing it off without any evidence to back his claims.
A panel of experts across multiple Government agencies, including Public Health England, analysed the best scientific studies from around the world, though they did not say which or how many papers they looked at.
But the team, led by NHS watchdog NICE, said it was not possible to determine a direct relationship between vitamin D and Covid, citing a lack of high-quality trials.
Researchers study different strains of Listeria in pigs
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Il cambiamento climatico minaccia gli olivi e l olio come li conosciamo oggi
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