FACT CHECK
The Mail Online and the Daily Express have claimed a new study has found that 99% of Covid-19 patients who are deficient in vitamin D die. But this conclusion cannot be made based on what is reported in the study.
It is true that among participants with deficient vitamin D levels in the study, 99% died. However, the vitamin D-deficient group in this study were also far older and far more likely to have underlying health conditions.
Because these risk factors, and others like ethnicity and obesity weren’t accounted for in the study, we can’t tell whether vitamin D deficiency does affect a patient's likelihood of dying from Covid-19.
There is no strong evidence at present to suggest that vitamin D helps to prevent or limit Covid-19 illness.
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