Vitamin D

A study found that lower vitamin D levels at age 39 were linked to Alzheimer's-related brain changes 16 years later.

Daylight may be a free blood sugar aid many people are not using.

Light powers our cells, sets our internal clock, and eases symptoms of seasonal depression.

Emerging science reveals that sunlight triggers vital antiviral, antioxidant, and respiratory-boosting effects far beyond vitamin D alone.

Choosing the wrong type of vitamin D supplement may do more harm than good, researchers say.

Diagnostic tests can offer a window into immune health.

Chronic joint and muscle conditions aren’t just tied to age. Daily habits can raise risk long before symptoms show up.

Researchers found that vitamin D supplements helped preserve telomere length—a marker of aging—but experts say lifestyle and context matter more.

Plant-based diets lack vitamin B12 and may also make other key nutrients harder to absorb. Learn how to compensate.

Although there's no way to stop aging, certain supplements combined with exercise might help slow this natural process.

How to maximize the benefits while minimizing the risks.

Learn about the critical health implications of vitamin D deficiency, especially for pregnant women.

Read about how to boost melatonin production and which foods act as natural sleep aids.

This can potentially reduce the risk of fractures and osteoporosis later in life, but the average prenatal vitamin may not contain enough. 

Higher doses don't provide additional benefits, according to the new research.

Do the sun’s infrared and UV light health benefits outweigh those of sun-wrought and supplemented vitamin D? Watch our exclusive episode, only on NTD. “I recommend to many of my ...

A study predicts millions will die from antibiotic-resistant superbugs over the next 25 years, but you can prepare by building your immunity.

Recent research stresses the importance of vitamin D in bone healing in children.

A recent analysis indicates that vitamin D testing and supplementation aren't necessary for most people.

A new study reveals an inverse relationship between vitamin D levels and the risk of dental cavities in people ages 65 and older.

Discover vitamin D's lesser-known benefits and the best times to take it for your goals.

Women who supplemented vitamin D both during pregnancy and six months postpartum reduced their babies' chances of developing rickets, a recent study shows.

How much vitamin D, beyond the “recommended dose,” is needed to fight cancer? What’s the right balance of copper and zinc to stem tumor growth? Watch our exclusive episode, only ...

We often hear about the dangers of vitamin and mineral deficiencies, but what about taking too many?

While sunshine supplies essential nutrients to our bodies, too much can be harmful. Beyond bathing our skin with lotions there are ways to protect from within.

Which supplements best shield the brain against toxicity? In which forms and in what amounts are they most effective? Watch our exclusive episode, only on NTD. Dr. Russell Blaylock, a ...

A new meta-analysis from Taiwan found that the vitamin offers pain relief without the downsides of traditional painkillers.