If you've recently started taking a new vitamin or supplement, you might wonder how long it takes for vitamins to work or when you’ll notice a difference. The answer depends on several factors, ...

Vitamin D supplements are generally in your system after 4 to 12 weeks. Learn more about the importance of consistent supplementation to sustain results.

SEATTLE — As Pacific Northwesterners go deeper into the "big dark," some may wonder about their vitamin D levels. "It's so unique because it's the one vitamin that we actually get from the sun, ...

Health experts say most memory supplements don’t prevent dementia; exercise, nutrition, and treating vitamin deficiencies matter more.

Biotin, also known as vitamin H, can be found in tiny amounts in various foods, such as bananas, egg yolks and nuts. The vitamin helps maintain the health of the skin, hair, eyes, liver and nervous ...

Hair Vitamins and Supplements: What Are They and Do They Work? This article was reviewed by Addie Ganik, MD, FAAD. If you got a dollar for every time a celebrity promoted hair supplements, you’d be ...