Frequently asked.
Can't find what you need? Email our lab directly — we reply within one working day.
Compliance
Are these peptides legal to buy in the UK?+
Yes — for in-vitro laboratory research. UK Peptide Labs sells only to research customers and explicitly does not supply for human or veterinary consumption. By placing an order you confirm the products are intended solely for laboratory research use.
Do you ship to private addresses?+
We ship to UK addresses verified at checkout. The customer remains responsible for compliance with all applicable local laws around handling, storage and disposal of research chemicals.
Do you supply human-grade or pharmaceutical product?+
No. We supply research-grade peptides only. Our products are not manufactured under MHRA pharmaceutical GMP and are not intended for use in food, drugs or cosmetics.
Purity & COAs
What is the minimum purity?+
≥98% by reverse-phase HPLC. Most batches ship at ≥99%. Any batch that falls below 98% on either the in-house test or the Eurofins re-test is scrapped.
Where can I see a Certificate of Analysis?+
Every shipment includes a printed batch-specific COA. You can also request a sample PDF before ordering by emailing lab@ukpeptidelabs.com with the product you're interested in.
Do you provide mass-spec data?+
Yes. Every batch is confirmed by ESI mass-spectrometry; the molecular-weight result is printed on the COA alongside the HPLC chromatogram.
What about endotoxin?+
Every batch is screened by LAL gel-clot assay. Our ceiling is 0.05 EU/mg; most batches measure non-detectable.
Handling & storage
How should I store the lyophilised vial?+
Store sealed vials at 2–8 °C, protected from light. Most peptides are stable as the dry lyo cake for 24 months or more under those conditions.
How do I reconstitute?+
Most products reconstitute cleanly in bacteriostatic water for laboratory use. Detailed handling notes are printed on each product's protocol card and on the product page.
How long does the reconstituted solution last?+
Typically 14–56 days at 2–8 °C depending on the peptide. For longer-term storage, aliquot and freeze at −20 °C. Avoid repeated freeze-thaw cycles.
Orders & shipping
How quickly do you dispatch?+
Orders placed before 14:00 GMT on a working day are dispatched the same afternoon via Royal Mail Tracked 24 or DPD Next Day. Heat-sensitive peptides ship with a cold pack.
Is shipping discreet?+
Yes. Plain, unbranded outer mailer. The return address shows our company name only.
How does the standing order work?+
Choose a delivery frequency (every 30, 60 or 90 days) at checkout. Save 20% on the vial price and get free tracked UK shipping. Pause, swap or cancel any time from your account.