Popular Vitamin Supplement Causes Cancer Risk and Brain Metastasis

New research finds that the popular dietary supplement nicotinamide riboside could increase the risk of serious…

Your questions on vitamin D (and other supplements), answered

On Nutrition I received some excellent questions following my recent column on recent vitamin D research,…

How much vitamin D do I need, and should I take a supplement?

JoAnn E. Manson is the preventive medicine chief at Brigham and Women’s Hospital and a professor…

Two new trials find no link between vitamin D supplements and reduced risk of COVID-19

Credit: Unsplash/CC0 Public Domain Two large clinical trials published by The BMJ today show that boosting…

Study Finds Vitamin D Supplements Do Not Reduce Risk of Broken Bones

A new study finds that vitamin D3 supplements (2000 IU/day) do not reduce total, non-vertebral, or…

Vitamin D Supplements Fail to Prevent Bone Fractures in Large Clinical Trial

Image: Shutterstock (Shutterstock) An extra dose of vitamin D probably won’t make the average person’s bones…

Is There A Superior Vitamin C Product For Skin?*

Joshua Zeichner, M.D., director of cosmetic and clinical research in dermatology at Mount Sinai Hospital in…

Can vitamin D supplements prevent autoimmune disease?

You don’t have to look far to find claims that taking vitamin D supplements…

Vitamin D and other supplements: Do they benefit breastfeeding?

Dietary recommendations during breastfeeding are complex because they affect both the person and their baby. Due…

Vitamin D and fish oil supplements may help prevent autoimmune disease, study says

People age 50 and older taking 2,000 IU (International Units) of vitamin D3 for over five…