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Dietary Supplements

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What are dietary supplements?

A dietary supplement is anything you add to your regular diet to improve your health or healing. They can include:

  • Vitamins

  • Minerals

  • Herbs

  • Homeopathic medicines

  • Some food products

Dietary supplements can be bought at grocery stores, health food stores, and pharmacies. They come in many forms, such as:

  • Pills

  • Capsules

  • Liquids

  • Meal replacement bars

  • Cookies

  • Powders

  • Elixirs

  • Teas


Who may need dietary supplements?

For most people, nutritional needs can be met by a balanced diet. Some people who may need supplements include:

  • Pregnant or nursing women

  • Young children or older adults

  • Vegetarians and vegans

  • People who need restricted diets

  • People who abuse alcohol

  • People who are ill or frail

  • Postmenopausal women


Dietary supplement safety

Taking large doses of supplements has not proven to be effective. In fact, it can be toxic. The National Institutes of Health does not advise taking vitamins or nutrients over the recommended daily allowances (RDAs).

Dietary supplements are not regulated by the FDA like medications. To help ensure quality, identity, purity, strength, and composition of dietary supplements, choose a supplement that has been tested by an independent third party, such as ConsumerLab.com, NSF International, or U.S. Pharmacopeia.

Always check with your healthcare provider before taking any supplements. Some may interfere with prescription medicines you take. Tell your provider what supplements you take and why. They can make sure your health concerns can be addressed.

Featured in

Online Medical Reviewer: Brittany Poulson MDA RDN CD CDE

Online Medical Reviewer: Jessica Gotwals RN BSN MPH

Online Medical Reviewer: Robert Hurd MD

Date Last Reviewed: 09/01/2025

© 2000-2026 The StayWell Company, LLC. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.

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