5 independent third-party assays of Mots-c, covering 4 vendors.
Measured purity across those assays runs from 97.5% to 99.9%, median 99.8%. The spread is the point: it is variation between lots and between vendors, not a single number that describes the compound.
Assay dates span 2024-01-05 to 2026-05-06.
Manufacturer recorded on the certificates: LabRat Lab, QSC, MOB PEPTIDES.
MOTS-c carries an evidence grade of D on this site (Preclinical). MOTS-c (Mitochondrial Open Reading Frame of the 12S rRNA-c) is a 16-amino-acid mitochondrial-derived peptide (MDP) encoded within the mitochondrial 12S rRNA gene (MT-RNR1). Discovered in 2015 by Lee et al. at USC, it acts as a metabolic…
A certificate of analysis describes the lot that was submitted and nothing else. It is not a guarantee about a later batch, and purity is not identity — a sample can assay clean and still be the wrong compound, or the right compound at the wrong concentration. Vendors with no assay row below have not been tested here, which is not the same as having failed.
| Vendor | Assays | Median measured purity | Most recent |
|---|---|---|---|
| MOB Peptides | 1 | 99.9% | 2024-01-05 |
| Growth Guys Canada | 2 | 99.9% | 2026-01-16 |
| Qingdao Sigma Chemical QSC | 1 | 99.2% | 2024-02-23 |
| Lab Rat Peptide | 1 | 97.5% | 2026-05-06 |
Compound profile: Mots-c — evidence, mechanism and safety.
Vendors assayed: MOB Peptides, Growth Guys Canada, Qingdao Sigma Chemical QSC, Lab Rat Peptide.