We respond to every inquiry within one business day. Please do not include medical history, prescription details, or any other Protected Health Information in your message — see our HIPAA Notice for details.
General and Order Support
Email: info@greatestpeptides.com For questions about products, orders, shipping, returns, COAs, and account access.
Privacy and Data Requests
Email: info@greatestpeptides.com For Privacy Policy questions, CCPA / CPRA requests, and data-deletion requests.
Wholesale and Bulk Inquiries
Email: info@greatestpeptides.com For research-institution and lab-supply inquiries, including custom quantities.
Hours
Monday – Friday, 9:00 AM – 5:00 PM Pacific Time. We do not respond to inquiries on U.S. federal holidays.
Response Time
Most inquiries are answered within one business day. Order-related issues marked URGENT in the subject line are prioritized.