Is vitamin D deficiency actually a good thing?

Screening for vitamin D has exploded — with no good evidence that it helps people. ... Most of us actually get enough vitamin D without even trying. .... "For healthy individuals, if you're tired and weak, but it's nondescript, this is a really tempting thing to do: measure vitamin D and then treat," Dr. read more

Vitamin D deficiency. Osteomalacia is most often caused by a prolonged lack of vitamin D. Vitamin D comes from two main sources: sunlight, which accounts for 80 percent of the vitamin D you need, and your diet from which you get the remaining 20 percent. In the UK over one in ten adults are deficient in vitamin D. read more

Vitamin D deficiency can occur for a number of reasons: You don't consume the recommended levels of the vitamin over time. This is likely if you follow a strict vegan diet, because most of the natural sources are animal-based, including fish and fish oils, egg yolks, fortified milk, and beef liver. read more