Effective date: 21 August 2026.
Customer and product support
Email support@mekkpeptide.com for catalogue, specification, document, shipping, account, privacy or post-order questions.
Returns and formal complaints
Email zhouyou8045@gmail.com with the order number and a concise description. MEKK will confirm receipt and provide case-specific instructions. This email address is a contact channel and is not a physical return address.
Order notifications
Automated order notifications are sent from the MEKK mail system. Replies are handled through the support address above. Never email passwords, API keys, complete payment credentials or unnecessary identity documents.