Find Information About:

Drugs & Supplements

Get information and reviews on prescription drugs, over-the-counter medications, vitamins, and supplements. Search by name or medical condition.

Pill Identifier

Pill Identifier

Having trouble identifying your pills?

Enter the shape, color, or imprint of your prescription or OTC drug. Our pill identification tool will display pictures that you can compare to your pill.

Get Started

My Medicine

Save your medicine, check interactions, sign up for FDA alerts, create family profiles and more.

Get Started

WebMD Health Experts and Community

Talk to health experts and other people like you in WebMD's Communities. It's a safe forum where you can create or participate in support groups and discussions about health topics that interest you.

  • Second Opinion

    Second Opinion

    Read expert perspectives on popular health topics.

  • Community


    Connect with people like you, and get expert guidance on living a healthy life.

Got a health question? Get answers provided by leading organizations, doctors, and experts.

Get Answers

Sign up to receive WebMD's award-winning content delivered to your inbox.

Sign Up

Font Size

Vitamin D Supplements Don't Help Your Health: Review

Except in people with a vitamin deficiency, supplements may cause harm, doctor says

WebMD News from HealthDay

By Robert Preidt

HealthDay Reporter

FRIDAY, Jan. 24, 2014 (HealthDay News) -- There's little evidence that vitamin D supplements offer substantial health benefits, and several ongoing studies are unlikely to change that, according to a large new review.

Vitamin D supplements are taken by nearly half of American adults, according to the researchers.

The review authors analyzed the findings of 40 studies and determined that taking vitamin D supplements does not reduce the risk of heart attack, stroke, cancer or bone fractures in the general population by more than 15 percent.

That result suggests that vitamin D supplements likely provide few, if any, health benefits, said Dr. Mark Bolland, of the University of Auckland in New Zealand, and colleagues.

The study appears in the Jan. 25 issue of The Lancet Diabetes & Endocrinology.

Unless used in people with vitamin D deficiency, there is legitimate concern that taking vitamin D supplements might actually cause harm, professor Karl Michaelsson, of Uppsala University in Sweden, wrote in an accompanying journal editorial.

Previous research has shown that vitamin D deficiency is associated with poor health and early death. But recent evidence suggests that low levels of vitamin D are a result, not a cause, of poor health, according to a journal news release.

Vitamins and
Lifestyle Guide

Which Nutrients
Are You Missing?

Learn More

Today on WebMD

vitamin rich groceries
Do you know your vitamin ABCs?
St Johns wart
Ease hot flashes and other symptoms.
Are you getting enough?
Take your medication
Wonder pill or overkill?
fruits and vegetables
Woman sleeping
Woman staring into space with coffee

Send yourself a link to download the app.

Loading ...

Please wait...

This feature is temporarily unavailable. Please try again later.


Now check your email account on your mobile phone to download your new app.