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Before sending a question, you may want to look at our answers to frequently asked questions or search our Web site using the search box located at the upper right corner of this page.

ODS provides general information about dietary supplement ingredients. Please note that we cannot answer specific medical questions, make referrals, or provide guidance on the use of dietary supplements. Those questions are best answered by a physician or other qualified health care provider who can tell you if dietary supplements are right for you and what effects they may have on your health.

Please use the form provided to email questions or suggestions about ODS's Web site. You may expect a response to your message within 7-10 business days. You must fill in every box below.

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Alternately, you can write to us at this address. We can only respond to letters written in English.

Office of Dietary Supplements
National Institutes of Health
6100 Executive Blvd., Room 3B01, MSC 7517
Bethesda, MD 20892-7517
Rockville, MD 20852 (Use only for courier services such as FedEx, UPS, & Airborne)

Tel: (301)435-2920
Fax: (301)480-1845