Vendor and compound
PT-141 from Koi Peptides
Koi Peptides lists PT-141 at $4.00 per mg, 11% under the $4.50 peer median. No third-party certificate for PT-141 from Koi Peptides has been located, so nothing here establishes what is in the vial. The cheapest listed price for PT-141 anywhere in the index is $2.20 per mg at Eternal Peptides.
All PT-141 vendors · Koi Peptides profile · scores 75.1 of 100, rank 12 · 0 certificates for this compound · verified 28 Sept 2026
What it costs
| Vial | Listed price | Per mg | vs peer median | Listing |
|---|---|---|---|---|
| 10 mg | $39.95 | $4.00 | -11% | PT-141 |
Read from the vendor’s own store and normalised per milligram, because a smaller vial at a lower sticker price is usually the dearer peptide.
What the laboratory found
No third-party certificate for PT-141 from Koi Peptides has been located.
That is a statement about the public record, not an accusation. The vendor may test and not publish, or publish somewhere we have not read. What it means for a buyer is that the price above is the only thing established here, and price says nothing about what is in the vial.
Vendors whose certificates you can check yourself lists the ones where that gap is closed.
Other vendors selling PT-141
| Vendor | Score | Per mg | Certificates for this compound |
|---|---|---|---|
| Origin Labs | 89.1 | — | 1 |
| Next Gen Peptides | 87.7 | $2.50 | 4 |
| Amino Club | 86.1 | $3.00 | 0 |
| Modern Aminos | 79.7 | $4.10 | 0 |
| Bench Grade Peptides | 79.4 | $4.60 | 2 |
| One Aminos | 78 | $6.00 | 1 |
| Simple Peptide | 77.2 | $4.50 | 1 |
| NeuroLabs Research | 74.6 | $7.19 | 0 |
Ordered by overall evidence score. See every vendor listing PT-141.
Questions
Is PT-141 from Koi Peptides third-party tested?
Not so far as this index can establish. No third-party certificate for PT-141 from Koi Peptides has been located. The vendor may test and not publish; what can be said is that nothing public establishes the contents of a vial.
How much does PT-141 cost at Koi Peptides?
$4.00 per milligram, from 10 mg at $39.95. The peer median across every vendor we price for PT-141 is $4.50 per mg, so this is -11% against the market. Prices are normalised per milligram so vials of different sizes compare fairly.
Is Koi Peptides a good place to buy PT-141?
Koi Peptides scores 75.1 of 100 on the published rubric and ranks 12 overall, computed from its documentation rather than from opinion. For PT-141 specifically no certificate is on file, which is the gap to weigh. Eternal Peptides lists it cheaper at $2.20 per mg.