Frequently asked questions
Common questions about purity and documentation, storage, reconstitution, shipping and ordering. Still stuck? Send us a request.
What purity are RetaNord peptides, and how is it verified?
Every RetaNord batch is guaranteed at 99%+ identity purity. Each lot is tested through Veritalys, an EU peptide testing service — HPLC for purity and content, with identity confirmed against a reference standard. A lot-specific Certificate of Analysis is included with every order.
What is on a Certificate of Analysis, and how do I read it?
The CoA is a signed lab document tied to your specific lot. It shows purity percentage (target 99%+), identity confirmation against a reference standard, physical appearance and endotoxin level (target below 1 EU/mg). The lot number on your vial matches the lot ID on the document, so you can verify what you received against what was tested. Our field-by-field CoA guide walks through each line.
How should I store the product?
Sealed lyophilized vials are stable at room temperature for short-term storage (under three months) in a cool, dry, dark place. For longer storage, refrigerate at 2–8 °C or freeze at −20 °C, and avoid repeat freeze–thaw cycles. Stored correctly, lyophilized peptides typically remain stable for 2+ years. See storing lyophilized peptides.
How do I reconstitute a peptide and work out the volume?
Reconstitution means adding bacteriostatic water to the lyophilized powder. The volume you draw depends on the vial strength, the water added and your target amount. Our reconstitution calculator does the maths, and the reconstitution guide covers technique. Reference information for laboratory use only.
How fast does RetaNord ship, and what does it cost?
Shipping across the EU is free over €200 (under that, €14.50 to a parcel locker or €19.50 by courier to your address). Orders are dispatched within 24–48 hours from Germany, Austria or Estonia. Delivery across the EU takes 3–4 business days from your order, tracked to your door or a parcel locker. We email you the tracking code as soon as it ships.
Is the packaging discreet?
Yes. Orders ship in plain, unbranded outer packaging — no product names, no logos, and nothing on the outside indicating what is inside. The sender shows as a neutral business name. The lot-specific Certificate of Analysis travels inside the parcel, not on the outside.
Do you ship internationally?
RetaNord ships across all EU member states. Availability outside the EU depends on local customs regulations for research materials — send us a request with your destination country and we will confirm what is possible.
Do we ship to your country?
We ship to every country in the European Union — free shipping, dispatched in 24–48h. Pick your country to check.
See all 27 EU countries we ship to
How do I place an order?
Ordering is handled right here on the website — choose your compounds, pick a delivery point and pay by card at our secure checkout. Tap Order anywhere on the site, or go straight to checkout. For product or wholesale questions first, send a request.
What does “research use only” mean?
All RetaNord products are supplied strictly for laboratory and in vitro research. They are not for human or veterinary use, not for any diagnostic or therapeutic application, and have not been evaluated by the European Medicines Agency or any other regulatory authority. We sell to private individuals aged 21 or older and to businesses, for research only.
Who can order from RetaNord?
Private individuals and businesses who buy for laboratory or in-vitro research. Private buyers must be 21 or older. Our products are not for use in people or animals.