About
A vendor directory built to be checked
VialPost exists because the two numbers that decide whether a research-peptide purchase was good value — what it costs per milligram, and how much of that milligram is the compound — are not published together anywhere a buyer can check.
Why
The gap this fills
Vendors publish prices in incomparable units and purity as a claim. Certificates of analysis are frequently supplied by the party being assessed, sometimes undated, sometimes with no lot number matching the vial and no named reference standard. Meanwhile the vendor list itself churns: sites close overnight, and buyers find out when an order stops shipping.
So this site does three narrow things and tries to do them well. It normalises observed vendor prices to a cost per milligram. It records vendor status changes with dates and sources. And it buys vials at retail, strips their labels, has them assayed by a third-party laboratory, and publishes the result pass or fail.
What this site publishes is data, the method behind it, the tools to work with it, and the disclosures that let you weigh it. It does not publish articles written to rank, and it does not publish dosing or medical guidance.
Principles
Rules we hold ourselves to
- Every number carries a source and a date. Where neither exists, the space stays empty — an empty cell is a finding, an estimate is not.
- Illustrative figures are labelled as illustrative, visibly, wherever they appear.
- No vendor can pay for a grade, a ranking position, or silence about a failure.
- Every vial tested is bought at full retail price. Nothing is accepted as a gift or a sample.
- Corrections are published on the record, dated, with the original figure left visible.
- All compounds are covered for laboratory research use only. No dosing, medical or therapeutic guidance is published here.
Team
Who is behind this
VialPost is run by a small desk. These are the roles, and what each one is responsible for.
- Editor and analyst
Sets the testing queue, writes the records, owns corrections.
- Laboratory liaison
Manages sample submission, chain of custody and laboratory relationships.
Fairness
What no one can buy here
- We don’t rank vendors. No vendor can pay for a better position.
- Every fact links to its source, with the date we checked it.
- Some links earn us a commission. It never changes what we show.
Its commercial arrangements — what it can earn from and what that does not buy — are set out in full on the disclosures page, and the testing rules those arrangements cannot touch are on the methodology page.
Contact
Corrections and enquiries
Write to contact@vialpost.com. Vendors, readers and laboratories use the same address.
Corrections are welcome and are handled under the published corrections policy: the record is amended, dated, and the original figure stays visible. Vendors disputing a result are invited to say so on the record.