ERP
This is one entry from the TitrateLab Vendor Graveyard, a dated archive of peptide-market shutdowns, buyer-loss reports and enforcement actions. Documented as community group-test findings, reported April 2026. Evidence tier: Single published account. Sources for this entry are linked inline below and annotated in the full Vendor Graveyard entry.
An April 19, 2026 write-up reports a community group test, organised by roughly 80 to 85 buyers, of about 12 ERP products. Most came back acceptable on purity. ERP-branded SS-31 measured 44.10 mg against a 50 mg label, with an endotoxin reading above the assay’s validated range.
According to the write-up, the group submitted ERP product to Janoshik under a neutral label, “Strong Like Bull” (SLB), so that the vendor could not reuse the certificates in its marketing. Our corpus holds the assay certificate that matches the reported SS-31 figure: Janoshik #134235, sample “SS-31 50mg”, manufacturer printed as “STRONG LIKE BULL (SLB)”, 44.10 mg at 99.743% purity, ordered March 16 and analysed April 16, 2026. The certificate does not name ERP. The link to ERP rests on the write-up, which also reports that ERP disputed the attribution, pointing to the neutral label and to cap colours. We do not hold the endotoxin certificate.
| Test | Label | Result | Delta |
|---|---|---|---|
| SS-31 mass | 50 mg | 44.10 mg | −11.8% |
| SS-31 endotoxin | — | >10 EU/vial (estimated 26.79) | above validated reporting range |
An 11.8% shortfall on the certificate we hold is outside normal measurement error for one vial; whether that vial was ERP product rests on the write-up. The same write-up criticises how ERP responded to buyers who presented the results. We have not seen the underlying messages and do not repeat the specific allegations; readers can weigh the source directly.
How this squares with the endotoxin data above. The batch-quality entry on ERP records 42 of 43 published endotoxin readings on ERP-labelled product as low, below quantitation, negative or passing. This report concerns one SS-31 submission whose endotoxin certificate we do not hold. The one high ERP reading we do hold is on a different product, hCG. Neither establishes a general endotoxin problem at ERP, and we hold no second SS-31 endotoxin reading to set against this one.
Evidence tier: Single published account.
Sources: “The Trouble with ERP”, April 19, 2026; Janoshik #134235; GLP-1 Forum discussion thread.
Related TitrateLab research: ERP, WBS and JKL: Three Names, One Chinese Peptide Supplier? examines the shared ads, product codes and pricing that connect ERP with WBS and JKL.