During this quarantine everyone has been less exposed to the sunlight, therefore their levels of vitamin-D had been reduced. The British government is advising that its citizens should take a controlled dosage to raise them up. By clicking on the link you can access the article to find out the importance of vitamin-D.
this is too short and “the article” is not displayed here.
The BBC article description is good, but it would be nice if the URL could be moved up.
The article uses the historical recommendation for vitamin D daily intake to improve serum vitamin D levels (10 micrograms = 400 IU), however scientific evidence points that the adult dose should be between 800-1000 IU/day to achieve a normal vitamin D level, as per
https://www.medscape.com/viewarticle/589256_8
Therefore, Vitamin D supplement intake should be around 20-25 micrograms (800-1000 IU)/day.