A new study reveals that taking vitamin D2 supplements might surprisingly lower your body's crucial vitamin D3 levels, essential for immunity and bone health. Researchers suggest D3, derived from ...

All products featured on GQ are independently selected by our editors. However, we may receive compensation from retailers and/or from purchases of products through these links. As far as nutrients go ...

What Exactly Is Vitamin D? Despite its name, vitamin D isn't a vitamin—it's a hormone. Unlike traditional vitamins that we must obtain solely from food, our bodies can produce vitamin D naturally when ...

Discover how vitamin D from fish, mushrooms, fortified foods, and supplements plays a critical role in preventing deficiency ...