Contact us by phone

Customer Service 1-800-404-8171
Monday – Friday 9:00am – 7:00pm EST

Contact us by fax
Customer Service fax 978-539-0087

Contact us via email

We work incredibly hard to respond to all emails within a 12-hour period. Emails are answered in the order they are received during our normal business hours of Monday-Friday 9am – 7pm EST. Emails sent after business hours and on the weekends will not be replied to until the next business day. After this time it is best to call our toll-free number to speak with a Zone Representative for immediate assistance.

  • For USA inquiries regarding products, orders, shipping, account and log-in information:
  • For general wellness questions about the Zone Diet and how it works:
  • Note: Please do not send medical questions to this email as we cannot offer medical advice or consultation.  Please consult your physician with specific health concerns.  If you are interested in Dr. Barry Sears’ point of view on many chronic illnesses, please visit his web site at
  • For business, partnership, promotional or marketing opportunities: 

International Customers

For INTERNATIONAL inquiries regarding products, orders, shipping, account and log-in:

INTERNATIONAL phone numbers: 1-800-404-8171 | 978-539-0100

Corporate Headquarters Mailing Address:

Zone Labs Inc.
200 Corporate Place, Suite 7
Peabody, MA 01960