M-Peptide Science
Also known as M-PS, MPS, MPS Science
M-Peptide Science provides lab certificates for 83% of batches tracked—below the site median of 89%—though community members have organized 41 independent tests against their products, more than double the median, suggesting customers are filling gaps in the vendor's own testing disclosure. One batch (M2P0S27-6J, a BPC-157 & TB-500 blend) was flagged after failing identity testing, and three direct problem reports have been filed against their batches. Purity across certified batches runs consistently high at 99.81% median, with measured fill averaging 110% of label claims.
Written from the batch and test records on this page. Every certificate counted here was commissioned by the vendor — no independent test has been submitted to the site. Updated 2026-10-20.
Evidence Summary
63
Batches Tracked
52
Batches Tested
99.7%
Avg Purity
100%
Identity Pass Rate
57 certificates seen. 3 of them name no lot we can match a vial to, so they are not counted in the figures above.
Last independent test: 2 weeks ago
Peptides
Batch History
| Batch | Peptide | Test Status | First Seen | Mentions |
|---|---|---|---|---|
| M8P0S25-9S | KLOW | Untested | 4 days ago | 1 |
| M1P5S03-9S | Retatrutide | Untested | 2 weeks ago | 3 |
| M3P0S03-9S | Retatrutide | Untested | 2 weeks ago | 2 |
| M5P0S03-8A | Retatrutide | 99.9% | 2 weeks ago | 0 |
| M6P0S01-11N | Tirzepatide | 99.8% | 2 weeks ago | 0 |
| M1P5S03-S9 | Retatrutide | Untested | 2 weeks ago | 1 |
| M1P0S21-8A | Ipamorelin | 99.4% | 1 month ago | 2 |
| M1P0S24-8A | MOTS-C | 99.4% | 1 month ago | 5 |
| M1P0S07-7J | Tesamorelin | Untested | 1 month ago | 1 |
| M5P0S31-7J | SS-31 | Untested | 1 month ago | 10 |