Refund and Returns Policy
When a refund or replacement applies, and how to request one.
When a refund or replacement applies, and how to request one.
Last updated: January 1, 2026
Important: Because our products are sensitive research chemicals, we cannot accept returns of opened or used products. This policy explains exactly when a refund or replacement applies.
We issue a refund or replacement for:
Due to the sensitive nature of research peptides, we do not accept returns of opened, used, or reconstituted products under any circumstances, and cannot refund orders based on a change of mind after dispatch.
If your order arrives at ambient temperature and you believe cold-chain integrity was compromised, contact coldchain@marquepeptides.com within 24 hours of delivery with photos. We’ll assess and replace at no charge if integrity is questionable.
Email support@marquepeptides.com with your order number and supporting documentation (photos, third-party test results, etc. as applicable). Requests are reviewed within 24 hours.
Orders can be modified or cancelled within 2 hours of placement. After that, orders enter fulfillment and cannot be changed — contact support@marquepeptides.com immediately for urgent changes.
Eligibility still applies: This policy operates alongside our Terms & Conditions — all purchases remain subject to the Research Use Only eligibility standard.