Too much vitamin D, or vitamin D toxicity, happens due to a buildup of calcium in the blood (hypercalcemia), which can be ...

A daily vitamin D supplement can support bone strength, muscle function, and balance—especially in people who are vitamin D ...

We don't yet know if vitamin D supplements can boost your immune system, as research on the topic has shown mixed results. If you want to try vitamin D supplements for better immune health, your ...