Björk Guðmundsdóttir was born in Reykjavik, Iceland, in 1965, the daughter of an electrician and an activist. She was ...

Improper use of vitamin D supplements can lead to toxicity, calcium imbalance, and gastrointestinal issues. It is crucial to consult a healthcare provider before starting supplementation and to ...

Vitamin D levels can be measured with a blood test. This test can indicate whether you have adequate levels, are at risk of a vitamin D deficiency, or have levels that are too high. Levels that are ...