Vitamin D And COVID-19: Could 800IU A Day Be 'Goldilocks' Compromise?

Should vitamin D supplementation be recommended by European governments to prevent COVID-19 infection? If so, at what strength? These are key questions that continue to fuel debate over this trending vitamin. Looking at the latest interventions from government agencies and scientists in the UK and Germany, it seems a consensus may be achievable for 800IU vitamin D via daily supplementation for anyone who cannot get enough from the sun or from their diet.