Peptidology

Why we recommend Peptidology

Peptidology operates at peptidology.co (note: the .com TLD is an unrelated business) and tests through an ISO 17025-accredited laboratory in Scottsdale, Arizona. ISO 17025 is the international competence standard for testing and calibration laboratories — the same accreditation required of labs that report to regulatory agencies. In a market where labs are often unnamed or unaccredited, Peptidology's use of an ISO 17025-accredited facility is a meaningful differentiator. Testing score: 6.5 out of 7. Founded 2021.

Testing & COA practices

HPLC purity and mass-spec identity are the two testing panels — the same dual-panel approach used by QSC Peptides with Janoshik, but here done through a US-domestic ISO-accredited lab. Mass-spec identity is the stronger confirmation that a compound is correctly synthesized; it catches wrong-peptide errors that HPLC alone cannot reliably identify. COAs are published per-batch and linked from product pages. Our 4 May 2026 verification confirmed active documentation at peptidology.co.

Product range and pricing

Peptidology operates as a tier-2 vendor with mid-range catalog breadth. Classic research peptides, GLP-1 compounds, and several longevity SKUs are represented. Shipping is $8.95 domestic. Discount code PEPTDOL10 applies for 10% off.

Where they fall short

Sterility and endotoxin testing are absent — two panels that matter for the most rigorous parenteral research applications. The TLD confusion (peptidology.co vs .com) is a minor but real friction point that could send researchers to an unrelated site. Community track record is shallower than Core Peptides given the 2021 founding date. No international warehousing.

Bottom line

Peptidology is a strong choice for US researchers who want ISO 17025-accredited testing documentation — a meaningful quality signal above unlabeled or non-accredited labs. For most dual-panel (HPLC + mass-spec) needs it is directly comparable to QSC Peptides, with the advantage of US-domestic accredited testing. Confirm you're at peptidology.co at checkout. Use code PEPTDOL10.