156 published test results across 45 vendors · latest: 12 Oct 2026
| # | Vendor | Tests | Price/mg | Score |
|---|---|---|---|---|
| 1 | PPeptide Sciences | 6 | $5.50 | 77 |
| 2 | BBulk Peptide Wholesale | 4 | $1.50 | 76 |
| 3 | UUther Unverified | 4 | — | 75 |
| 4 | HHK Peptides Unverified | 7 | — | 74 |
| 5 | SShanghai ERP peptide Biotechnology Unverified | 3 | $0.69 | 74 |
| 6 | PPeptidology | 4 | $9.00 | 73 |
| 7 | RReta-Peptide | 6 | $0.60 | 73 |
| 8 | SShanxi Qianyecao Biotech QYC Unverified | 3 | $1.80 | 73 |
| 9 | ZZLZ Peptide Unverified | 3 | $0.62 | 73 |
| 10 | NNexaph | 3 | — | 72 |
Computed from publicly published third-party results. How scoring works · every listing is free and un-buyable. Vendors marked Unverified appear for their published results but are left out of the vendor rankings.
PT-141 is bremelanotide, which crossed the approval line: as Vyleesi, it has been an FDA-approved drug for low sexual desire in premenopausal women since 2019. Research-market vials sell the same molecule outside that narrow indication, mostly to men, for whom it was never approved.
The record covers 117 published tests from 32 vendors, and the pricing is the story: $0.60 to $9.00 per milligram among the current top five, a fifteen-fold difference. The score range across that spread is five points. As with every compound where we see this pattern, the premium buys branding and small-order convenience, not measurably better material.
The top-scored vendor’s most recent published test dates to August 2025, over a year old, while the fifth-place entry tested in August 2026 at the lowest price on the board. Our scoring discounts thin records but cannot make old tests current, so on this leaderboard the last-tested column deserves your first look, not your last. The semaglutide guide walks through the same date-first reading in more depth.
Same molecule, different everything else. Vyleesi is a manufactured pharmaceutical in an autoinjector with a prescription behind it. A research vial is unregulated powder whose contents are only as good as its published batch record.
No manufacturing controls, no sterility assurance, no accountability. The discount prices in the difference.
Identity confirmation, purity, and measured quantity against the label for the exact batch in your order, verifiable on the issuing lab’s site. Our verification guide covers the check.
Nothing on this page is medical advice; compounds shown are sold for research purposes only. Data is aggregated from publicly published third-party results and traces to its source.