Article URL: https://www.bbc.com/news/articles/cm78pxxe55v0o Comments URL: https://news.ycombinator.com/item?id=50305436 Points: 45 # Comments: 37. Doctors are finding vitamin D deficiency is increasingly widespread in the UK, especially in young people. But the symptoms are difficult to spot and can be missed. Vitamin D is an important nutrient that your body requires to function normally. This nutrient helps you resist infections by boosting your immune system as well as improving glucose metabolism..