Vitamin D supplements are widely used around the world, but health experts say it’s important to understand how daily intake ...

Vitamin D deficiency has become increasingly common despite abundant sunlight in many regions. Doctors link the trend to indoor lifestyles, pollution, limited sun exposure, and dietary gaps. Low ...

Medically reviewed by Lindsay Cook, PharmD Key Takeaways About 14% of people developed a vitamin D deficiency after one year ...

Vitamin D is an important nutrient but one that people tend to lack during the winter months. Vitamin D helps keep bones strong and works to support the body's immune system. The main way people get ...

Here’s what vitamin D3 is and why your body needs it.

Supplementation does not change four-week cumulative incidence of health care utilization among adults with newly diagnosed COVID-19.

Taking vitamin C and D together boosts your immune system and supports bone health. Both vitamins may enhance wound healing and prevent infections.

A major clinical trial has delivered an unexpected twist in the search for ways to fight COVID-19 and its lingering effects. Researchers at Mass General Brigham found that taking high doses of vitamin ...

In a large, randomized trial, researchers at Mass General Brigham found that high-dose vitamin D3 did not reduce COVID-19 ...

In a large, randomized trial, researchers at Mass General Brigham have found that high-dose vitamin D3 did not reduce COVID-19 infection severity, but may impact long COVID outcomes.