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Contact Us

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 you can trust about dietary supplement ingredients. We cannot provide personal medical advice or make referrals to healthcare providers. Many of your questions about dietary supplements are best answered by a physician or other qualified healthcare provider who is familiar with your medical history and situation..

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.

  • Please include all pertinent details within the contact message box. We do not open attachments to email messages.
  • We can only respond to email messages written in English.


Alternatively, 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