Beginner's guide
If you've landed on this site after seeing a peptide mentioned somewhere and you're not sure what you're looking at, this page is for you. Plain English. No jargon (or where we have to use jargon, we explain it). No assumptions about what you already know. Read it once, end to end, and you'll have a clear picture of what we sell, why we sell it the way we do, what arrives at your door if you order, and what the safety net is if something goes wrong.
Peptides are short chains of amino acids - the same building blocks proteins are made of, just shorter. The compounds in our catalogue are synthetic peptides: chemically manufactured rather than extracted from biological sources, and supplied as reference reagents for in-vitro and laboratory research.
"Research-grade" is a quality and supply category, not a different kind of molecule. The same chemistry, supplied with documentation and traceability for laboratory use, characterised in the published peer-reviewed literature. The closest analogy is research-chemical suppliers like Sigma-Aldrich, Cayman Chemical, Tocris Bioscience, or Bachem - large, established companies that supply the same kind of reference compounds to academic and industrial laboratories.
Yes - for the compounds we supply. Research-grade peptides for in-vitro and laboratory use are legal to buy and possess in the UK, provided two conditions are met:
For the longer version with citations to the legislation see our full UK legality guide for research peptides.
Because that is what we supply - research-grade reference reagents. The framing isn't a wink, and it isn't a coverup. It's the legal category that all research-chemical suppliers operate in (the big ones too: Sigma, Cayman, Tocris, Bachem). We don't make therapeutic claims, we don't supply for human consumption, and we don't give dosing advice or protocols. If you're looking for medical advice, that is what a qualified medical practitioner is for, not a research supplier.
Practically: every page on the site has the "research use only" framing because it's the truth, not because we're hiding behind it.
HPLC is short for High-Performance Liquid Chromatography. It's a laboratory technique that separates a sample into its individual chemical components and measures how much of each is present. For a peptide, an HPLC test answers a single critical question: what percentage of what's in the vial is actually the peptide we said it was?
A "99% HPLC purity" result means the target peptide accounts for 99% of everything in the vial. The other 1% is impurities (synthesis byproducts, truncated variants, degradation products). A 95% pure peptide has five times more impurity load than a 99% peptide - not a small difference for laboratory work where impurities can affect results.
Two things make HPLC results meaningful:
Discreet shipping. The Royal Mail outer is plain - no branding visible from outside. Inside the outer envelope you'll find:
Royal Mail Tracked 24 by default; Special Delivery before 11am for an upgrade. Same-day dispatch on UK weekday orders received before 2pm.
[Photo placeholder - "what arrives at your door" unboxing photo, to be added once shot.]
Currently it's a four-step flow. There's no "Buy Now" checkout button because mainstream payment processors classify research-chemical suppliers as high-risk and refuse to onboard us - an industry-wide problem we're actively working on (Open Banking and crypto options are in setup). For now:
The full flow is documented step-by-step on our how-orders-work page, including a transparent answer to "why bank transfer?" if you're wondering.
Message us first - WhatsApp +44 7886 853464 or email info@blackandwhitepeptides.co.uk. Visible damage in transit, missing COA, mis-shipment - we'll make it right. Our published Returns Policy and Refund Policy set out the formal terms.
| Lyophilised | Freeze-dried. The standard supply form for peptides - stable in this state for years. |
| Vial | The small sealed glass container holding the lyophilised peptide. |
| Reconstitution | Adding liquid (typically bacteriostatic water) back into the lyophilised vial to dissolve the peptide for laboratory use. |
| Bacteriostatic water | Sterile water with 0.9% benzyl alcohol added as a preservative. The standard diluent for research peptides; available from research-chemical suppliers. |
| COA | Certificate of Analysis - the lab report showing the test results for a specific batch. |
| Batch / Lot | A specific manufacturing run. Each batch has its own number and its own COA. |
| HPLC | High-Performance Liquid Chromatography - the standard test for peptide purity. |
| Mass spec / MS | Mass Spectrometry - complementary test that confirms the molecular weight of the peptide matches what it should be. |
| Half-life | How long the molecule lasts in serum before half of it has been broken down or cleared. Reported in published literature, varies dramatically between compounds. |
| Receptor agonist | A compound that activates a specific receptor when it binds. Most peptides in our catalogue are receptor agonists for one or more receptor systems. |