Guides & comparisons
How the Peppies price radar works — and what it deliberately leaves out
Where our vendor pricing comes from, how landed prices are calculated, which products we exclude and why, and why a price tells you almost nothing about what is in the vial.
Every vendor page on this site draws on the same dataset. This page explains what that dataset is, how it is built, and — more usefully — what it cannot tell you.
What is being measured
The radar monitors vendors across the European research-peptide market and records, for each product it can see, a landed price in euro: what the item actually costs delivered, rather than the shelf price before shipping and fees are added. Comparing shelf prices across vendors is close to meaningless when one ships free above €100 and another adds €25 to every order.
Prices are re-checked continuously. Every figure carries the date it was recorded, because in this market they move week to week, and a price list without a date is decoration.
When we say a vendor sits “below the tracked median” for an item, the median is taken across every vendor we track carrying that same compound at that same strength and format. It is a comparison against the observed market, not against a recommended price.
What “checkout-certified” means
Some offers are marked as checkout-certified. That means the ordering path has been tested end to end and a purchase can be completed through Peppies, with the batch record attached to the item in your inventory.
It is a statement about the mechanics of ordering, not an endorsement of the vendor, and not a quality judgement about the product. An uncertified vendor is not a worse vendor. It usually means nobody has done the integration work yet.
What we exclude, and why
The vendor pages do not list every product a shop sells. Prescription-only medicines and their investigational analogues are omitted — the GLP-1 class among them, along with growth-hormone products and substances restricted or banned in EU member states.
The reason is legal rather than editorial. EU law prohibits advertising prescription-only medicines to the general public, and the definition of advertising is wide enough that a priced listing on a commercial site is not obviously outside it. We would rather publish a partial list for a defensible reason than a complete one for none.
Where items are excluded, the vendor page says how many.
Why we do not link vendor storefronts
Vendor pages name shops but do not link to them. That is a deliberate commercial decision on our part and you should know it is one: we aggregate buying options, and sending traffic onward is not what we are here to do. If you want to visit a shop, its name is right there and a search engine will find it in a second.
What a price does not tell you
This is the part worth reading twice.
A landed price says nothing about what is in the vial. It does not tell you the purity, whether the batch was tested, whether the certificate accompanying it is real, whether the peptide was stored anywhere near correctly between synthesis and your door, or whether the vendor will still exist in six months.
Two vials of the same compound at the same strength from two vendors can differ enormously in all of those, and cost within a euro of each other. Price is the easiest variable to measure, which is exactly why it gets over-weighted.
If you want to judge a batch rather than a price, these are the questions that matter:
- How to read a certificate of analysis — what the numbers on a COA actually mean, and which ones are load-bearing
- Red flags on a fake COA — the patterns that show a certificate was not produced by the lab it claims
- Checking a testing lab’s ISO 17025 accreditation — because a COA is only as good as the lab behind it
- What a COA cannot tell you — sterility, endotoxin and storage sit outside what most certificates cover
Corrections
If you run a shop listed here and a figure is wrong, tell us and we will check it against the source and correct it with the date of the change. Vendors do not get to choose whether they appear, but they are entitled to have the numbers be right.