Every batch,
verified before you buy.

A Certificate of Analysis (CoA) is the laboratory report that tells you what is actually in a research peptide vial — and it is the single most important document to check before buying research peptides.

HPLC purity — high-performance liquid chromatography measures how much of the sample is the target peptide, shown as a percentage (e.g. 99.2%). Reputable research-grade material is typically 98%+. Mass spectrometry (identity) confirms the molecular weight matches the intended peptide, proving the vial contains what the label claims. Endotoxin and sterility results are relevant to many research applications. Batch / lot number ties the certificate to the exact production lot in your vial — a CoA that does not match your lot number tells you nothing about your material. Testing methods — HPLC purity and mass-spectrometry identity are the analytical checks that matter; a CoA that names its methods and matches your exact lot number is what makes the result meaningful.

At DNR Peptides every lot links to its own CoA, and you can verify any batch code on our site before you order. If a supplier cannot produce a batch-specific CoA, treat the purity claim as unverified.

Research peptides are supplied lyophilised (freeze-dried) because the dry powder is far more stable than peptide in solution. Correct storage protects the integrity of your research material.

Before reconstitution: follow the storage condition printed on that lot's Certificate of Analysis — for most lyophilised peptides that is -20°C, though some, GHK-Cu among them, are specified warmer. Keep them desiccated (away from moisture) and out of direct light; in this state they remain stable for extended periods. Avoid repeated temperature swings: let a vial reach room temperature before opening to stop condensation drawing moisture into the powder — which is why a desiccant and a sealed container matter. After reconstitution (for in-vitro work), peptide in solution is less stable and is typically kept refrigerated and used within a shorter window, with working dilutions prepared per the laboratory's own assay protocol.

Good storage discipline is the difference between reproducible results and degraded material. Every DNR Peptides vial ships with storage guidance and a Certificate of Analysis for the lot.

BPC-157 and TB-500 are two of the most searched-for research peptides and are often mentioned together — but they are distinct compounds studied in different contexts. This is a factual, research-use comparison, not medical guidance.

BPC-157 is a synthetic pentadecapeptide (15 amino acids), molecular weight ~1419 g/mol, widely used in laboratory and in-vitro research. TB-500 is a synthetic fragment related to thymosin beta-4, with a different structure and molecular weight (~888 g/mol). In research terms the two are studied along different pathways and are not interchangeable; researchers select based on the specific model or assay.

Purity and verification matter more than the choice between them: for either compound, the meaningful question is whether the exact lot you receive carries a batch-specific CoA confirming HPLC purity and mass-spec identity. Both are supplied lyophilised and stored at -20°C. (DNR Peptides stocks BPC-157; TB-500 is referenced here for comparison.) Whichever your research calls for, verify the batch before you buy.

In the UK and many other jurisdictions, research peptides may be lawfully sold and bought when they are supplied as research chemicals, labelled not for human consumption, and sold without medical or performance claims. The compound doesn't change — its legal status is decided by how it is presented and sold, and by the rules of the country it is imported into.

A peptide sold as a research reagent, for laboratory and in-vitro use only, sits in a lawful category. The same peptide marketed for human use, with dosing instructions or health claims, can be treated as an unlicensed medicine under the MHRA. DNR Peptides supplies strictly on a research-use-only basis, with a Certificate of Analysis on every lot; you are responsible for lawful handling and use. (Educational information, not legal advice.)

No. All DNR Peptides products are laboratory research reagents supplied strictly for in-vitro and analytical research use only. They are not for human or veterinary use, consumption or administration in any form. We cannot provide guidance on human use or dosing.

DNR Peptides is UK-based and every order is dispatched from the UK by tracked courier, wherever in the world it's heading — nothing is drop-shipped to you from a third country.

We supply qualified professionals, laboratories and researchers who are acquiring reference-grade materials for legitimate research and accept sole responsibility for lawful handling and use.

In the UK and many other jurisdictions, research peptides may be lawfully sold as research chemicals labelled not for human consumption, with no medical or performance claims. We supply on exactly that research-use-only basis. You are responsible for lawful handling and use, and — for international orders — for confirming that research reagents may be imported into your country.

Yes — every lot ships with, or links to, a Certificate of Analysis confirming HPLC purity and mass-spectrometry identity. The batch code on each product resolves to the exact CoA on file for that lot.

Each production lot is HPLC purity- and mass-spectrometry identity-tested by the manufacturer’s own laboratory, which issues the Certificate of Analysis for that batch. That testing is in-house at the manufacturer, not by an independent third-party lab — we’d rather state it plainly than let it be assumed.

Purity is stated on each lot's Certificate of Analysis — typically ≥98% by HPLC. The CoA for the specific lot you receive, confirming that lot's HPLC purity and mass-spec identity, is issued with your order and emailed with your dispatch confirmation.

Enter the lot code from your product or label into our batch-lookup tool and it returns the Certificate of Analysis for that lot — HPLC purity, mass-spec identity, report date — as the original PDF, readable before you order rather than after. The lookup accepts either the DNR lot printed on the vial or the manufacturer lot printed on the certificate. The same document is emailed with your dispatch confirmation.

Worldwide, from the UK, by tracked courier, in plain and discreet packaging with no external branding indicating the contents. Every parcel is declared accurately for customs. Each dispatch links the Certificate of Analysis for the lot supplied.

Orders are dispatched within a few working days as your batch is prepared, then typically arrive within 1–2 working days on a tracked service, with tracking shared on dispatch.

UK shipping is £6.50, or free on orders over £120. International shipping is a flat £9.99, tracked, anywhere in the world. Priority dispatch is an optional +£3.50. You'll see the exact total at checkout before paying.

Yes — we ship worldwide from the UK, tracked, for a flat £9.99. Parcels are declared accurately as research reagents, and it is your responsibility to confirm they may be imported into your country: we cannot refund or reship orders seized, delayed or returned by customs. Import duties and taxes are not included in our prices. Orders into the EU are charged import VAT on delivery — around 21–23% depending on the country — plus a courier handling fee, payable by you before the parcel is released. Other countries apply their own rules. UK orders pay by bank and are not affected; international orders are paid with crypto.

Checkout is by secure cryptocurrency (Bitcoin) at launch — you're shown a payment invoice at checkout and the order confirms once payment clears. No card details are ever entered or stored on our site. More payment options are planned.

No — at checkout you'll get a secure invoice with an amount and address (or a QR code). Pay it from your wallet or exchange and your order confirms automatically. Crypto payments are fast, private and can't be charged back.

Yes, as long as it hasn't been dispatched. Email hello@dnrpeptides.com with your order number and we'll sort it.

Yes — for larger or repeat orders, email hello@dnrpeptides.com and we'll put together trade pricing.

Our peptides are supplied lyophilised (freeze-dried) and should be stored as stated on that lot's Certificate of Analysis — typically -20°C, kept desiccated and away from light, though GHK-Cu is specified at 8–15°C. The certificate for every lot we stock is published under its lot number.

Lyophilised and stored correctly at -20°C, research peptides are stable long-term. Once reconstituted for laboratory work they are best kept refrigerated and used within your protocol's working window.

Because these are temperature-sensitive research materials we can't accept returns, but anything that arrives damaged or incorrect, or is confirmed lost in transit, is replaced free — no return needed. Just email us within 48 hours of delivery with your order number and a photo of the issue and we'll dispatch a replacement.