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FAQ · Quality · Legality · Shipping

Everything you'd want to ask before your first vial.

Honest answers to the questions researchers and informed clients send us most. If yours isn't here, message us on WhatsApp — a real person will reply.

Are research peptides legal in Spain?+
Peptides supplied for in-vitro and laboratory research are legal to purchase, possess and ship within Spain and the EU when classified strictly as research compounds — not as therapeutic products. We do not supply for human use, and we do not make therapeutic claims.
How do you verify purity?+
Every batch is tested by an independent third-party laboratory using High-Performance Liquid Chromatography (HPLC). The Certificate of Analysis (COA) is included with every order and lists purity percentage, molecular weight, testing methodology and batch ID.
How should peptides be stored, and how long do they last?+
Sealed, unopened (freeze-dried) vials from a 10-vial kit keep for roughly 8–12 months when stored cold — 2–8 °C for near-term use, -20 °C for long-term. Once mixed with bacteriostatic water, keep the vial in the fridge at 2–8 °C and use it within about 2 months. Protect from light and avoid repeated freeze-thaw cycles.
How long does a 10-vial kit last?+
A sealed 10-vial kit stays good for about 8–12 months in cold storage, so one kit comfortably covers a long research protocol without re-ordering. Each vial you mix with bacteriostatic water then lasts around 2 months refrigerated.
What is bacteriostatic water and why does it matter?+
Bacteriostatic water contains 0.9% benzyl alcohol, which prevents bacterial growth in multi-use vials. It's the standard solvent for reconstituting lyophilised research peptides in sterile laboratory settings.
How fast is shipping?+
Every order ships with fully tracked courier service in discreet, temperature-controlled packaging. Depending on stock and destination, parcels dispatch from our fulfillment hubs in China, Germany, or the USA. Typical transit windows: Spain and the rest of Europe (including the UK) 5–14 days; USA and Canada 5–18 days; rest of world 7–21 days. You receive a tracking link the moment your parcel is collected.
Do you ship worldwide?+
Yes — discreet, tracked international delivery to the UK, EU, USA, Canada, Australia, the Middle East and beyond. Express options available on request via WhatsApp.
What payment methods do you accept?+
Two secure payment options: (1) SEPA / IBAN bank transfer, and (2) card payment via our secure Wise link. Please send as an instant transfer if possible. Once payment is sent, confirm via WhatsApp so we can dispatch quickly. Remember: don't say anything about peptides in the payment reference or notes, or your payment will be stopped by the bank.
What if my order arrives damaged?+
Report damaged or incorrect items within 48 hours of delivery with photos and we'll replace or refund — no friction. Because of the sensitive nature of research compounds, we cannot accept returns on opened vials.
Why choose Regena over a Telegram seller or underground forum?+
You get verified compounds (HPLC, COA), a real human on WhatsApp for questions, transparent pricing, cold-chain shipping, and a business with a fixed Marbella address and verified review presence on Trustpilot, Google and Scamadviser. That's not what underground sellers offer.
Do you offer guidance on protocols?+
Yes — book a free 20-minute consultation. We map relevant reference compounds for your goals, walk through mechanism, dosing windows and stacking, and stay available for questions throughout your protocol.
Is my information kept private?+
Absolutely. We never share names, addresses, order history or consultation content with third parties. Discretion is non-negotiable for our clientele.
What's the difference between Retatrutide, Tirzepatide and Semaglutide?+
Semaglutide is a GLP-1 mono-agonist. Tirzepatide adds GIP receptor activity (dual agonist). Retatrutide is a triple agonist that also recruits the glucagon receptor — broadening the pharmacology in research models. See our peptide library for full reference profiles.

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