GNC Customer Service

The customer service department, including the GNC phone number, appears to be open 24 hours a day. There is no mention of shortened hours, but we expect reduced hours or no customer service support during holidays.

  • : 1-877-462-4700

GNC Mailing Address

This mailing address is for the customer service department of the GNC company. We found the address in the privacy policy, not on the customer service page. Many companies offer the mailing address for privacy concerns, which is why all customers should check the privacy policy when a customer service site does not list the mailing address. Sending your communication to GNC by mail is a slow process. There is no guarantee your letter will be answered either, so if your issue is related to an order or financial problem, use another means of contact.

GNC Department300 6th Ave. Pittsburgh, PA 15222

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