P-21
20 vendors · 4 sizes · $1.50–$50.00 per mg at 10mg · observed Sep 1–Sep 18
2 of the 20 sellers we assessed publish a certificate for the batch they ship.
"Third-party tested" is a claim about who tested it. A certificate you can open is a document. Only the second is counted here.
At 10mg
How this is ordered Grouped by what each seller publishes about testing, strongest first, and cheapest first inside every group. Nobody is left out — the cheapest sellers on this page are in the last group. Sort by price instead →
Shows you a certificate for the batch COA 1 of 10 sellers we read
The listing publishes a test certificate, or promises one per batch. This is the only group where a document exists to open.
| Vendor | Price | Per mg | |
|---|---|---|---|
| Puregenixpeptides Sep 18 | $40.00 | $4.00 | visit |
Says it was tested — names nobody tested 1 of 10 sellers we read
A claim about method — "HPLC", "lab tested" — naming no laboratory and showing no document.
| Vendor | Price | Per mg | |
|---|---|---|---|
| Optimumcompounds Sep 18 | $50.00 | $5.00 | visit |
Nothing about testing in the listing none 8 of 10 sellers we read
We found no mention of testing on the page we read. That is a fact about this listing and not about the seller — they may publish certificates somewhere we have not looked.
| Vendor | Price | Per mg | |
|---|---|---|---|
| Divinebougie Sep 17 | $15.00 | $1.50 | visit |
| Aminoannex Sep 17 | $60.00 | $6.00 | visit |
| Health Tides Sep 17 | $70.00 | $7.00 | visit |
| Bulkpeptidesupply Sep 17 | $75.00 | $7.50 | visit |
| Verifiedpeptides Sep 18 | $119.00 | $11.90 | visit |
| Pinnaclebiosupply Sep 18 | $124.99 | $12.50 | visit |
| Alphaomegapeptide Sep 17 | $198.00 | $19.80 | visit |
| Bulkpeptidewholesale Sep 17 | $500.00 | $50.00 | visit |
Withheld from this comparison: 1 seller publishing in another currency. We publish only prices we read in US dollars, and we convert nothing.
Sellers of P-21 also list
Want to be told when P-21 moves? Watch this price → We haven't started sending these yet — this is us finding out whether anybody wants them.