Prevention of covid-19 and other acute respiratory infections with cod liver oil supplementation, a low dose vitamin D supplement: quadruple blinded, randomised placebo controlled trial
Sonja H Brunvoll, Anders B Nygaard, Merete Ellingjord-Dale, Petter Holland, Mette Stausland Istre, Karl Trygve Kalleberg, Camilla L Søraas, Kirsten B Holven, Stine M Ulven, Anette Hjartåker, Trond Haider, Fridtjof Lund-Johansen, John Arne Dahl, Haakon E Meyer, Arne Søraas
BMJ, doi:10.1136/bmj-2022-071245
Objective To determine if daily supplementation with cod liver oil, a low dose vitamin D supplement, in winter, prevents SARS-CoV-2 infection, serious covid-19, or other acute respiratory infections in adults in Norway.
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