Researchers are still trying to understand why some people develop Long COVID: lasting symptoms of the disease that can ...

Vitamin D is an essential nutrient for your immune system, heart health, and more. However, most Americans don't get enough vitamin D.

Vitamin D is one of the most widely used dietary supplements in the world, but many people are unsure about the best time of day to take it.

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

Vitamin D is a fat-soluble vitamin and supplement that supports bone health and the immune system. Supplements like magnesium or calcium shouldn't be taken with it.

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

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

Vitamin-D fortified milk, milk alternatives, and orange juice are great sources of vitamin D. Some waters and sports drinks have added vitamin D as well.

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

Plus, how to up your intake.

“Egg yolks are one of the few natural sources of vitamin D, and because vitamin D is fat-soluble, pairing eggs with healthy fats—like avocado or olive oil—helps your body use it more effectively,” ...

Low vitamin D levels may affect your sex drive by influencing hormones, mood, energy, and blood flow. Learn how vitamin D deficiency affects libido and whether supplements can help.