Returns & Refunds

We stand behind every product we ship. Our 30-day return policy exists because we are confident in what we supply — and because we believe researchers deserve a supplier they can trust completely. If something is not right with your order, we want to make it right, quickly and without unnecessary friction.

To be eligible for a return, items must be unused, unopened, and in the same condition you received them, including original packaging. We require this not to create barriers, but because the integrity of research-grade compounds depends on unbroken handling and storage conditions. A compound that has been opened or improperly stored cannot be vouched for — and we would never re-supply something we cannot stand behind.

All you need to initiate a return is your order number or confirmation email. No account required, no complicated form — just an email to our returns team and we will take it from there.

We are transparent about what cannot be returned — and the reasons are scientific, not bureaucratic. Once a peptide vial has been opened, reconstituted, or exposed to conditions outside the specified storage range, its integrity can no longer be independently verified. Accepting such returns would put the next customer at risk, and that is something we will never do.

Items not eligible for return include: opened or partially used vials; products stored outside the specified temperature range; custom or special-order compounds; and items returned more than 30 days after delivery. These boundaries are firm, but they are drawn in the interest of every researcher who depends on us for accurate, reliable compounds.

If you are ever uncertain whether your situation qualifies, please contact us before returning anything. We would rather have the conversation and help you find the right outcome than leave you to guess.

Despite our rigorous quality controls and careful packing procedures, damage during transit — though rare — can occasionally occur. If you receive an item that is damaged, defective, or different from what you ordered, we want to hear from you immediately. This is not just a policy obligation — it is a genuine commitment to making things right.

Contact returns@simplexpeptides.com within 48 hours of delivery. Include your order number, a description of the issue, and a photo showing the item and its packaging. We review every claim personally and respond the same business day wherever possible.

For all confirmed damage or fulfilment errors, we cover 100% of the resolution — whether that is a free replacement shipment or a full refund including original shipping costs. We do not ask you to return damaged items. We do not charge restocking fees. And we do not make you wait weeks for a resolution. Our record of resolving these situations swiftly is something we are genuinely proud of.

Starting a return with Simplex Peptides is deliberately simple. Email returns@simplexpeptides.com with your order number, the item(s) you wish to return, and a brief reason. Our dedicated returns team will respond within 1 business day with a Return Merchandise Authorisation (RMA) number and step-by-step instructions. We handle every return personally — there is no automated queue, no chatbot, and no form designed to wear you down.

Please wait for your RMA number before sending anything back. This ensures your return is logged in our system from the moment it leaves your hands and that we are ready to process it as soon as it arrives. Returns without an RMA may cause delays we would both prefer to avoid.

Pack your return securely — ideally in the original packaging — and write your RMA number clearly on the outside. We recommend using a tracked service so you have proof of postage. Once we receive and inspect the item, we move quickly.

We process refunds promptly — because making you wait for money that is rightfully yours is not something we consider acceptable. Once your returned item arrives and passes inspection (typically within 2 business days of receipt), your refund is approved and processed immediately. Funds reach your account within 3–5 business days from that point, depending on your payment provider.

Refunds are returned to the original payment method used at checkout. This is a standard security measure that protects both parties and ensures the money goes exactly where it came from. We will confirm every refund by email with a clear reference number so you always know the status.

Banks and payment processors sometimes take a few additional days to post refunds. If 10 business days have passed since our confirmation email and the funds have not appeared, we encourage you to check with your provider first — but our support team is always available to investigate on your behalf if needed.

We believe in being straightforward about costs. For returns due to customer preference — for example, ordering the wrong product or no longer needing an item — return shipping is the customer's responsibility. We recommend using a trackable service and keeping your proof of postage until the refund is confirmed.

For returns caused by our error — incorrect item shipped, product quality failure, or damage in transit — we cover all costs, including return shipping and any original delivery charges. You should never be out of pocket because we made a mistake, and we ensure you never are. In most damage cases, we do not even ask for the item back.

We operate a straightforward return-and-reorder process rather than direct exchanges. This gives you full flexibility — you get your refund confirmed, then place a fresh order for exactly what you need, with the same fast dispatch and quality guarantee. It is cleaner, faster, and gives you complete control over your next order.

If your return is the result of a defective or damaged product, we go a step further: we will dispatch a free replacement of the same item immediately upon confirming the issue, without waiting for the original to be returned. If that item happens to be out of stock, a full refund is issued the same day. We do not leave researchers without a resolution.

Our returns team is staffed by people who genuinely care about resolving your situation — not closing tickets. If you have a return, a refund query, or simply a question about whether your situation qualifies, reach out at returns@simplexpeptides.com with your order number in the subject line. We aim to respond to every returns enquiry within 1 business day.

We have handled thousands of orders and the vast majority complete without any issue. But when something does go wrong, our response time, our tone, and our willingness to resolve things fairly are what set us apart from suppliers who hide behind small print. We are proud of that — and we back it up every single day.