Frequently Asked Questions

All AtoZ Peptides products are sold strictly for in-vitro research and laboratory use only. They are NOT intended for human or animal consumption, are NOT dietary supplements, and have NOT been evaluated or approved by the FDA.

We publish a Certificate of Analysis for every lot we have had tested. Each COA shows the measured purity, the independent laboratory that ran it, and the lot number it belongs to. Identity is confirmed by FTIR and purity by HPLC. Our standard is a 98% minimum purity. Products without a published certificate show no purity figure anywhere on the site — you can read every certificate we hold at /coa.

We maintain a minimum purity standard of ≥98% as verified by independent third-party HPLC analysis. Many of our compounds exceed 99% purity.

Lyophilized peptides should be stored at -20°C for long-term storage. Reconstituted solutions should be stored at 2-8°C and used within 14 days. Always refer to the specific product documentation.

We accept cryptocurrency (Bitcoin on-chain, Lightning Network, and USDT on Tron) and Zelle. Save 5% when you pay with crypto or Zelle.

Yes. Our website uses SSL encryption and all payments are processed through reputable third-party providers. We do not store payment account details on our servers.

You must be at least 21 years of age to purchase from AtoZ Peptides.

Orders are processed within 1-2 business days. We ship via USPS with full tracking. Standard domestic delivery typically takes 3-5 business days.

Currently we ship to domestic USA addresses only, all 50 states including Alaska and Hawaii.

Yes. All orders ship in plain, unmarked packaging with no product descriptions or logos on the exterior.

Once your order ships, you'll receive an email with your USPS tracking number. You can also use our Order Tracking page.

First, check with household members and any safe delivery spots (porch, mailbox, side door), and wait 24 hours — tracking sometimes updates before actual delivery. If still missing after 48 hours: if you purchased shipping protection at checkout, email [email protected] with your order number — we'll file the claim with USPS on your behalf. Without shipping protection, you can file a claim directly with USPS at https://www.usps.com/help/claims.htm — we'll provide your tracking number, ship date, and order reference if needed.

All sales are final. We cannot accept returns once shipped.

We offer optional shipping protection (+$2.00) at checkout. This covers loss, theft, or damage during transit, up to $100 of order value. With shipping protection, we file the claim with USPS on your behalf. Without shipping protection, you can file a claim directly at https://www.usps.com/help/claims.htm — we'll provide your tracking number and order reference if you email [email protected].