However, when you buy something through our retail links, Condé Nast may earn an affiliate commission.As far as nutrients go, vitamin D is one of the most widely useful—but oft-overlooked—things we ...

How long it takes for vitamins and supplements to work depends on factors like the type of vitamin, your diet and hydration, ...

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