Buying and shipping
How to judge a supplier before you buy, and what actually happens after you order.
- How do you check a supplier is legitimate?
- How do you spot a fake peptide vendor?
- Why are some peptides so cheap?
- Is a higher price better quality?
- What does research use only mean?
- Does it matter which country peptides ship from?
- How fast do EU peptide orders ship?
- Will EU orders clear customs?
- How is a peptide batch quality tested?
- Why is the vial 10 mg?
How do you check a supplier is legitimate?
Ask for a lot-specific certificate before ordering and check it names an independent laboratory. A legitimate supplier produces one without hesitation. Then confirm the lot number on the certificate matches the vial you receive. Everything else — site design, reviews, claims — is easier to fake than matching documentation.
How do you spot a fake peptide vendor?
The recurring signals: no lot-specific certificate, or one reused across every batch; testing claims with no named laboratory; prices far below everyone else; dosing or human-use advice, which a research supplier should never give; and no traceable business identity. One of these is a question, several together is an answer.
Why are some peptides so cheap?
Because synthesis and purification are the expensive parts, and both can be cut. Fewer purification steps leave more truncated sequences and residual reagents. Skipping independent testing removes the cost of finding out. A price well below the market usually reflects a step that was skipped rather than an efficiency gained.
Is a higher price better quality?
Not on its own — price is easy to set and proves nothing. What distinguishes material is documentation: a lot-specific certificate from a named independent laboratory reporting both purity and identity. An unusually low price is a reason to check that documentation carefully, but a high one is not a substitute for it.
What does research use only mean?
It means the material is supplied for laboratory and in-vitro research, and is not for human or veterinary use. It is not a disclaimer added to the footer for cover — it defines what the product is. Material sold on that basis carries no approval for any other use.
Does it matter which country peptides ship from?
Yes, mainly through transit time and customs. Material shipped within the EU clears without an import step and spends less time in uncontrolled conditions. Long international transits add cumulative time and temperature exposure, plus the possibility of a customs hold of unpredictable length.
How fast do EU peptide orders ship?
RetaNord holds stock inside the EU and dispatches on the next working day. Delivery goes to a DPD Pickup point or, if you prefer, by tracked courier to your address. Shipping is free above €200; below that it is €14.50 to a Pickup point and €19.50 to your door.
Will EU orders clear customs?
Orders shipping within the EU move as internal freight, so there is no import clearance step and no customs charge. That is the practical advantage of EU stock — it removes the delay and the unpredictability that come with material entering from outside the customs union.
How is a peptide batch quality tested?
A batch is synthesised, purified, then sampled for testing. HPLC establishes purity by separating the sample and measuring relative peak areas. Mass spectrometry confirms identity against the theoretical mass. Results are recorded against the lot number and issued as a certificate, so a specific vial traces back to specific data.
Full guide: What Does 99% Peptide Purity Mean? HPLC & Mass Spec Explained →
Why is the vial 10 mg?
Because a reconstituted peptide degrades over time, so vial size is really a decision about how long material sits in solution. Ten milligrams is sized to be used within its documented stability window rather than stored dissolved for months. It is a potency choice, not a limit on how much you can buy.