GIVING Covid-19 patients a daily dose of metformin for two weeks could slash their risk of developing long Covid by 42 per cent, say scientists in the United States.

Researchers at the University of Minnesota gave patients 1,500mg of metformin daily within three days of them receiving a positive Covid test.

They then monitored them for almost a year. It is thought that the drug helps prevent long Covid by controlling high blood sugar levels, according to the study published online in medRxiv.

The theory is high blood sugar triggers an abnormal immune response that attacks healthy cells throughout the body - rather than just the Covid virus.

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