Manufacturer / brand review
Merck / Sigma-Aldrich has product and lot documentation infrastructure, but the inspected peptide lookup did not yield a full batch certificate.
Inspected sample results
No product-specific laboratory result was inspected in this research pass. Published methods and service specifications are described below; they are not measured batch results.
Testing methods and purification
Product pages provide product-specific HPLC specifications and lot COA lookup. A purity specification is not a measured result for the selected bottle.
How often is testing performed?
Lot documentation is offered. FAQ guidance distinguishes release dates from expiry/retest dates, which depend on available stability data. No universal annual retesting schedule is established.
What remains unverified
Specify catalogue and lot before assigning results. Do not transfer a general brand reputation or unrelated product COA to the peptide being purchased.
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: Not verified. 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.
Merck / Sigma-Aldrich customer reviews & ratings
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