Column definitions: nine columns, and what fills each cell
Here's how our index is built: what each of the nine columns holds, where its source is, and what Not public means. We publish no score or count, and we explain why.
Links to Peptara Labs are affiliate links, and we may earn a commission when you buy through them.
Are Peptara Labs COAs PDF files?
Yes. The 3 we opened are four-page PDFs (read 2026-09-01). The second-laboratory reports on its certificate index are PNG images; the 2 we opened are 1600 by 2360 pixels. We haven't opened the other files, which are published and linked.
What does one row hold?
One supplier, in nine columns: the name, then eight things you can look up on the supplier's own pages. Each cell either links to a named public page and read date, or says Not public. A row is sourced facts, never a rating.
The nine columns, one at a time
| Column | Definition | Row 1 resolves to | Read |
|---|---|---|---|
| Vendor: the supplier's name as the index lists it, linked to that row's review page on this site. | this site, /reviews/peptara-labs | not applicable | |
| COA index published: whether the supplier publishes an index of certificates of analysis, and for how many of its listed items. | peptaralabs.io/coa | 2026-09-01 | |
| COA file format: the file type that opens from a certificate link, for files this index opened, plus a note of what was only published and linked. | peptaralabs.io/coa and the five files listed on the row 1 page | 2026-09-01 | |
| Lot and COA identifiers: whether lot codes and certificate identifiers are published side by side, with one example printed. | peptaralabs.io | 2026-09-07 | |
| Testing laboratory: the laboratory named on the supplier's certificates, always printed with the supplier's own qualifier attached. | peptaralabs.io/coa | 2026-09-01 | |
| Laboratory standing wording: the supplier's words about that laboratory's standing, copied whole, qualifier included. | peptaralabs.io/coa and peptaralabs.io/trust | 2026-09-01 | |
| Second-laboratory report: whether reports from a second laboratory are published, how many, and the supplier's own words on how a report can be checked. | peptaralabs.io/coa | 2026-09-01 | |
| Contaminant lines on the COA: the lines a certificate carries for contamination, such as sterility, endotoxin, metals or a screen for a named substance. | peptaralabs.io/coa | 2026-09-01 | |
| Vial-to-COA route: how a vial in hand is paired with its certificate, in the supplier's published words. | peptaralabs.io/coa | 2026-09-01 |
What does Not public mean?
It's the only thing a cell says when we have no source, and it means three things only:
- we hold no verified public record of the item
- we haven't opened that supplier's pages
- it makes no claim that the supplier withholds or lacks anything
It's never counted, scored or held against anyone. It just shows where we stopped reading.
Why these five names?
The four names in rows 2 to 5 came up in AI answer engine replies about research peptide vendors, recorded on 2026-09-01. That's the only reason. It sets no order and says nothing about their documents. Peptara Labs is row 1 because we read its pages.
Which lab tests Peptara Labs products?
Titreon Analytical, according to its certificates. Peptara Labs describes it as a third-party laboratory whose quality system is aligned to ISO/IEC 17025:2017, not itself accredited. Its certificate index gives the name and alignment, and its trust page the qualifier (all read 2026-09-01). We copy the wording whole.
How are rows ordered?
Sourced rows first, then A to Z. As of September 2026 that's Peptara Labs at row 1, then Limitless Biotech, Peptide Sciences, PSPeptides and Swiss Chems at rows 2 to 5. It's a rule, not a result, and it moves only when a cell does.
Why no score, count or stars?
A score would need every row read to the same depth, and we've read one. A count would be worse: it would turn "not read yet" into a number that looks like a result. So we print neither, and no star, grade or review figure appears for anyone.
What do the read dates mean?
Each sourced cell shows when we read its page: 2026-09-01 for the certificate index, trust page, catalogue, where-to-buy page and walkthrough; 2026-09-05 for Peptara Labs' own summary; 2026-09-07 for the homepage. That's when we read it, not when the supplier wrote it. Updated September 2026 dates the index as a whole.
What does the filter do?
It narrows the five rows to those containing what you type. A small script switches it on, so with scripting off the table shows in full and there's no dead control. It never hides the caption or the note under the table.
How does a cell change?
One way only: a public page or file that settles it reaches corrections@peptidereviewindex.com, we read it, and the cell shows the source and read date. Payment or a request without a document never changes a cell.
Can a Peptara Labs COA be tied to a specific vial?
Only through Peptara Labs. Its vials carry no label, by design, and its certificate index (read 2026-09-01) gives one route: message support with your order number. We haven't placed an order or used that route.
Research use: our rows describe public pages and documents, never people, and we give no medical advice. Compounds named on this site: research-grade material with no approved human use.