Vitamin D is essential, but getting too much, especially from supplements, can have serious side effects. Too much vitamin D can cause dangerously high calcium levels in the blood, which can lead to ...

Medically reviewed by Jamie Johnson, RDN Key Takeaways Too much vitamin D can lead to harmful health effects, including high ...

Julia Ries Wexler is a writer focusing on all things health and wellness. She has over 10 years of experience in health journalism, and though she has written about pretty much every health topic ...

The "sunshine vitamin" may come with a dark side. Just as a lack of vitamin D can lead to health dangers, so too can an excess. For years now, scientists have warned that not everyone needs to take ...

Experts have issued a warning that vitamins, often taken for health, can actually become harmful. While they are essential ...