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RIO DE JANEIRO, BRAZIL - A new study shows that vitamin D has a protective effect against Covid-19, the disease caused by the novel coronavirus.

Researchers at Boston University School of Medicine in the United States analyzed blood samples from 235 patients hospitalized with Covid-19.

The study showed that patients who had at least 30 ng/mL of calcidiol (or 25-hydroxyvitamin D) significantly reduced their risk of becoming unconscious, experiencing respiratory distress or dying.

According to researchers, the patients' blood samples also showed fewer inflammatory markers and higher levels of lymphocytes, immune system cells.

Covid-19 has affected . . .

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