The NHS does recommend that everyone in the UK 'consider' vitamin D supplementation during the autumn and winter: https://www.nhs.uk/conditions/vitamins-and-min

The NHS does recommend that everyone in the UK 'consider' vitamin D supplementation during the autumn and winter: https://www.nhs.uk/conditions/vitamins-and-minerals/vitamin-d/ https://www.nhs.uk/conditions/vitamins-and-minerals/vitamin-... , because the amount of sunlight available in those months is not enough to maintain a healthy level.