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?+
Lyophilised peptides are best kept at -20 °C for long-term stability. Once reconstituted with bacteriostatic water, store between 2–8 °C in a refrigerator and use within the window specified on the COA. Protect from light and avoid repeated freeze-thaw cycles.
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. Typical transit windows: Costa del Sol same- or next-day; mainland Spain 24–48 hours; rest of Europe and the UK 5–14 days; USA and Canada 5–18 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?+
Three secure options: (1) Bank transfer to our SEPA / IBAN account, (2) Card payment via Wise (credit or debit, clears in minutes), and (3) PayPal sent as Friends & Family. Once payment is sent, please confirm via WhatsApp so we can dispatch quickly. Important: do NOT include any product names or the word "peptide" in the PayPal note or bank transfer reference / memo field. Thank you!
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.

Free download · PDF

Free: Peptide Storage & Reconstitution Guide

30-page PDF — vial handling, sterile reconstitution, dosing math, cold-chain storage. Plus a daily research insight email from the lab.

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Still have questions?

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We accept · Multiple secure payment methods

  • Bank Transfer
  • Card via Wise
  • PayPal