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
Defined Labs is a UK-operated sole trader supplying research materials exclusively for laboratory research. All products are supplied strictly for in vitro research use only and are not intended for human or veterinary use.
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. A full Certificate of Analysis with HPLC data, mass spectrometry confirmation, and batch-specific results is available on request.
Our commitment to the research community drives everything we do, from the compounds we source to the secure packaging we use for every dispatch.
≥99%
Minimum Purity
HPLC verified, every batch
100%
CoA Coverage
Available on request
Next Day
Delivery
Dispatched next business day
GMP
Compliance
Certified manufacturers
Quality Standards
How we ensure quality
Synthesis & Sourcing
Peptides synthesised 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
Certificate of Analysis available on request for every batch. Orders dispatched next day, securely packaged.
Ready to work with us?
Browse our catalogue or get in touch with any questions about specific compounds, custom orders, or bulk pricing.