High intakes of B vitamins may cause "neon pee." Your urine may turn bright yellow, orange or green. This side effect is harmless and doesn't pose any risks.

It’s generally safe to take B-complex vitamins and vitamin C together, but high vitamin C doses may affect B12 absorption.

Millennials are increasingly reporting joint pain, with experts linking it to vitamin D deficiency, sedentary lifestyles, and limited sun exposure.

New research shows vitamin D may help people with prediabetes reach normal blood sugar levels. Experts weigh in on what it means for diabetes risk.

Vitamin D is widely touted for bone and overall health, but taking too much can backfire. In fact, recent reports have linked extreme vitamin D supplementation to serious organ damage.

The textbooks say our ancestors lost the ability to make vitamin C because we didn't need it, but the loss may have protected us from some parasites ...

Vitamin B12 is an essential nutrient that supports our brain, nerves and energy metabolism. Eat these 11 vitamin B12-rich foods to up your intake, according to dietitians.

A new study out of Egypt suggests that a specialized form of vitamin D3 shows promise in improving core autism symptoms.

Are you eating enough vitamin C? Here's how much you should be consuming, according to nutrition experts.

Vitamin patches are a cute new way to take supplements. Doctors weigh in on how they work and whether they're more effective than oral supplements.

Why vitamin D advice fails people with darker skin tones - melanin-rich skin has evolved different vitamin D metabolism mechanisms.