Medically reviewed by Jamie Johnson, RDN Key Takeaways How fast vitamins work depends on factors such as the type of vitamin, your health, and how consistently you take them.If you’re deficient, you ...

New guidance suggests that when you take vitamins may matter just as much as what you take, with experts cautioning that some supplements can be less effective—or even disruptive—when consumed first ...

Dietary supplements are products like vitamins, minerals, and herbs that claim to promote wellness. Many of these supplements do have known benefits, but there are also risks you should know about.