Manufacturer / brand review
Biosynth publishes an identifiable research-peptide COA with an unusually important purity-definition caveat: two chemical forms count together.
Inspected sample results
PP51304, H-QPTESIVRF-OH, lot LB22-B1121, issued 20 August 2025: UPLC purity 95.8% (minimum 95%); ESI-MS 1076.6. The TFA-salt certificate states that target peptide and pGlu-form peptide are present in an unknown ratio and both peaks count toward final purity. No measured peptide content is supplied.
Testing methods and purification
The inspected research-grade COA uses UPLC at 215 nm and ESI-MS. GMP service pages separately describe content, solvents, counterions, water, endotoxin and microbial testing.
How often is testing performed?
A dated lot certificate was inspected. GMP release capabilities do not establish a universal test cadence across research catalogue products.
What remains unverified
The COA explicitly counts target and pGlu-form peaks toward purity in an unknown ratio. It does not demonstrate 95.8% of a single form or a clean contaminant panel.
Catalogue snapshot
Examples from the linked source, not a complete or real-time stock list. Institutional entries describe service categories. Shipping to Cyprus is not verified.
Why this score?
Points reward evidence maturity, not measured product purity. Claim-only points are limited; unknown criteria remain zero. Full rules are available in Research guidesBusiness decision guidesour methodology.
Verification limits
Lab attribution: Biosynth in-house certificate. A laboratory-hosted record, where explicitly identified, was inspected on the lab’s portal. No direct staff confirmation, blind purchase, independent sampling or full current-batch audit was performed by Peptide.cy. Absence of a recorded test is not proof of contamination.
Public claims about purification cost, manufacturing location or certifications are not treated as proof of a clean final product. An authenticated COA would still apply only to its identified sample.
Follow the evidence
Sources accessed 10 September 2026. Vendor claims and vendor-hosted reports are identified as such.
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