Persistent fatigue during pregnancy may signal nutrient deficiencies. Learn how hidden hunger, iron, vitamin D, and key ...

That plan to get fit already feels like a broken promise. But here's the deal: January is the worst time to make big, ...

Vitamin D is a real powerhouse. New research suggests this vitamin supports healthy aging, along with your immune system and ...

Learn the best vitamin D-rich foods, how much they provide, and why combining food, sunlight, and supplements is often the most effective approach for optimal health.

Background Previous systematic reviews on fracture and fall prevention have generally shown no efficacy with calcium or vitamin D alone and conflicting findings with that of vitamin D combined with ...

Taking Vitamin C and calcium together improves gut calcium absorption and may also enhance bone and immune system health.

Low levels of vitamin D seem to raise your risk of heart attack but scientists are still figuring out why—and whether supplements might help protect you. Vitamin D is thought to play a protective role ...

Nick Blackmer is a librarian, fact-checker, and researcher with more than 20 years of experience in consumer-facing health and wellness content. Vitamin C and vitamin D both support immune function in ...

The sunshine vitamin could affect your immune system and heart health. It has started to get really wintry here in London over the last few days. The mornings are frosty, the wind is biting, and it’s ...

Low levels of vitamin D and its principal circulating form 25-hydroxyvitamin D (25-OH-D) have been linked to many types of adverse outcomes beyond bone health, such as cardiovascular disease. How ...

DEAR DR. ROACH: Several years ago, in my early 80s, my gynecologist told me (like all women who mainly stayed indoors) that I should be taking 4,000 IU of vitamin D3 daily. Yet today, I read an ...

Vitamin D is known to be essential to many aspects of human health — but a new study suggests that taking a certain form of it can have a negative effect. The more potent and longer-lasting form, ...