Our Story
Built for researchers.
Defined by quality.
Defined Labs was founded with one goal: make high-purity research peptides accessible to serious researchers, without compromise on quality or documentation.
Mission
Precision you
can trust
Research demands precision. A compound with 85% purity introduces variables that can invalidate months of work. That's why every peptide we supply meets a minimum purity standard of ≥99%, verified by HPLC, before it leaves our facility.
We believe documentation is as important as the compound itself. Every order includes a full Certificate of Analysis with HPLC data, mass spectrometry confirmation, and lot-specific results — not a generic batch certificate.
Our commitment to the research community drives everything we do, from the compounds we source to the cold-chain packaging we use for every dispatch.
≥99%
Minimum Purity
HPLC verified, every batch
100%
CoA Coverage
Lot-specific, not generic
Next Day
Delivery
Temperature-controlled dispatch
GMP
Compliance
Certified manufacturers
Quality Standards
How we ensure quality
Synthesis & Sourcing
Peptides synthesised using Fmoc solid-phase synthesis by GMP-compliant manufacturers. Raw material purity verified before acceptance.
Analytical Testing
Each batch independently tested by HPLC for purity and by LC-MS for identity confirmation. Minimum purity threshold: ≥99%.
CoA & Dispatch
Lot-specific Certificate of Analysis issued for every batch. Lot-specific Certificate of Analysis issued for every batch. Orders dispatched next day in temperature-controlled packaging.
Ready to work with us?
Browse our catalogue or get in touch with any questions about specific compounds, custom orders, or bulk pricing.