Skip to content

Fitness & Exercise

Font Size

'Natural' Dietary Supplements

You’ve seen ads for "natural" supplements that promise to make you thinner, more muscular, smarter, or superenergized.

The fact that something is natural or herbal doesn’t mean it’s safe or that it lives up to its claims.

Always talk to your doctor before taking any dietary supplement, so you can choose wisely. Some supplements can interact with medicines or have other side effects.

Dietary supplements include a wide range of products, like multivitamins, minerals, amino acids, and herbs. Some come from natural sources, like plants. Others are man-made.

You can get supplements in a variety of forms, including capsules, pills, gel tablets, liquids, tinctures, extracts, and powders.

Supplement makers do not have to test their products for safety or purity before putting them on the market.

WebMD Medical Reference

Reviewed by David T. Derrer, MD on August 13, 2014

Healthy Living Tools

Ditch Those Inches

Set goals, tally calorie intake, track workouts and more, all via WebMD’s free Food & Fitness Planner.

Get Started

Today on WebMD

pilates instructor
15 moves that get results.
woman stretching before exercise
How and when to do it.
couple working out
Moves you can do at home.
woman exercising
Strengthen your core with these moves.
man exercising
knees to chest
Man looking at watch before workout
Overweight man sitting on park bench

Pollen counts, treatment tips, and more.

It's nothing to sneeze at.

Loading ...

Sending your email...

This feature is temporarily unavailable. Please try again later.


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

pilates instructor
jogger running among flowering plants
woman walking
woman doing pushups