The buzzy supplement is beloved by celebrities and starting to show up in skin care. But what can it actually do?

The new app called Sun Day tracks your UV exposure as well as Vitamin D levels. Last week, Dorsey introduced a new Bluetooth ...

"Many Americans are deficient in vitamin D due to limited sun exposure from indoor lifestyles, sunscreen use and our northern ...

So, while vitamin D2 and D3 perform the same functions, your body metabolizes vitamin D3 more efficiently than D2. Another key difference between the two forms of vitamin D is their source.

Trump says NYC mayoral candidate Zohran Mamdani should be arrested if he impedes ICE ...

Another group in the study took omega-3 supplements and did not experience the same results. Wondering if you’re getting enough vitamin D?

Understanding how melanin actually affects vitamin D production is reshaping our understanding of bone health, immune function, and disease prevention in people with darker skin tones.

The best time to take a vitamin D supplement is when it fits well into your day—and when you can remember to take it. When choosing a vitamin D supplement, consider opting for vitamin D3 over D2 ...

A new study suggests that vitamin D supplements may help preserve the length of telomeres, which "could mean a 3-year decrease in aging." ...

If you’re vitamin D-deficient, taking a vitamin D3 supplement could offer potential benefits, experts say. But how often do you actually need to take it, and who should avoid it?