Our story
Built on Science. Backed by Standards.
Otter Peptides UK was founded by researchers who were tired of compromising on quality. Every compound we supply reflects the same rigour we'd demand in our own labs.
Why we exist
The UK peptide market has long been plagued by inconsistent purity, opaque sourcing, and a lack of verifiable quality data. We built Otter Peptides UK to change that — supplying research-grade compounds with full traceability, third-party verification, and the transparency that serious researchers deserve.
Purity first
We set a minimum threshold of ≥99% purity across our entire catalogue. No exceptions, no compromises.
Full traceability
Every batch is traceable from synthesis to dispatch. We know exactly where each compound comes from and can prove it.
Third-party verified
We don't self-certify. Every lot is independently tested by accredited HPLC and MS laboratories before it reaches you.
Research integrity
Our compounds are sold exclusively for legitimate in-vitro research. We take that responsibility seriously.
Lab sourcing
Where our compounds come from
We work exclusively with GMP-certified synthesis facilities that operate under ISO 9001 quality management systems. Our supply chain is deliberately short — fewer intermediaries means fewer opportunities for contamination, mislabelling, or adulteration. Before any batch enters our inventory, it undergoes independent HPLC purity analysis and mass spectrometry identity confirmation at a UK-accredited third-party laboratory.
GMP synthesis
Compounds are synthesised at certified facilities under strict pharmaceutical-grade manufacturing protocols.
Identity confirmation
Mass spectrometry confirms the molecular identity of every batch before it leaves the synthesis facility.
Independent purity testing
HPLC analysis at a UK-accredited third-party lab verifies ≥99% purity. Batches that fall short are rejected.
Cold-chain storage
Verified compounds are lyophilised and stored at −20 °C in our UK facility until dispatch.
CoA on request
Certificates of Analysis for any current lot are available on request. We believe in full transparency.
Quality standards
Our quality commitments
Minimum purity
≥99% HPLC
Testing method
HPLC + MS
Lab accreditation
UK-accredited third party
Storage standard
−20 °C lyophilised
Shelf life (unopened)
24+ months
CoA availability
On request, per lot
Ready to explore our catalogue?
Every compound in our range meets the same exacting standards. Browse the full catalogue or visit the Research Hub for compound-specific science.