Buy one get one free on every single vial Free UK delivery over £100 Buy one get one free on every single vial 99% HPLC purity · COA per lot Buy one get one free on every single vial Same‑day UK dispatch before 2pm Buy one get one free on every single vial Free UK delivery over £100 Buy one get one free on every single vial 99% HPLC purity · COA per lot Buy one get one free on every single vial Same‑day UK dispatch before 2pm
Buy 1 get 1 free · every single vial

Research Peptides, UK Stocked. Janoshik‑Tested, Buy One Get One Free.

99% HPLC purity, verified per lot and published with a Certificate of Analysis you can read before you order.

2×
Buy one vial, get a second free.On every single vial in the catalogue. Add 1, receive 2 — applied automatically at the basket, no code needed.
Excellent
10,000+ researchers served
99%HPLC purity
Same‑dayUK dispatch
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BluePeak LP3-R 10mg lyophilised vial with its certificate of analysis: 99.4% HPLC purity, mass spectrometry identity confirmed, endotoxin below limit, independently tested. Research use only.

Every compound we supply is synthesised by vetted manufacturing partners, then independently checked by HPLC for purity and by mass spectrometry for identity before it is released to stock. Each lot ships with its own Certificate of Analysis, and the full COA library is public — no account required.

Research use only (RUO). BluePeak supplies chemical compounds for laboratory and analytical work. Nothing listed on this site is a medicine or a supplement, none of it is approved or intended for human or veterinary use, and we make no claim of any kind about what these compounds do in a living organism. Not for diagnostic or therapeutic use.

Questions about a batch or a COA? support@peptidesresearch.uk

99% HPLC
Purity verified per lot
Janoshik COA
Independent lab, every batch
UK dispatch
Same day before 2pm
Buy 1 get 1 free
Every single vial
60-day guarantee
Money back, no quibble
Discreet packaging
Plain outer box
Buy one, get one free

Add one vial, receive two

The price you see is the price for the pair — no code, no minimum spend.

1Add any single vial to your basket
2A second vial is added automatically
3You pay for one

Applies to every product in the catalogue, bacteriostatic water included.

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Compare fill weight, format and price, then open the HPLC Certificate of Analysis for the exact lot in stock. Every listing is a chemical specification — nothing more is implied or offered.

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RUO
Sterile solution · 3ml vial

BAC WATER 3ml

£9.95for 2 vials
£4.98 per vial · second vial free
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Compounds you can trust

A purity number on its own proves nothing

Anyone can print “99%” on a label. What matters is who tested it, what else they tested for, and whether you can read the report yourself. Every BluePeak lot is checked by an independent analytical lab and published with its own COA.

Verified purity

Tested before it reaches stock

  • HPLC purity analysis on every incoming lot
  • Mass spectrometry to confirm sequence and identity
  • Endotoxin and sterility screening
  • Batch‑specific COA published openly, no login
UK fulfilment

Dispatched from the UK, not customs

  • Stock held in a UK warehouse — no import delays
  • Same‑day dispatch on orders placed before 2pm
  • Plain, discreet outer packaging as standard
  • Tracked from dispatch through to delivery
Straightforward buying

Priced and packed for real labs

  • Buy one, get one free on every single vial
  • Free 10ml bacteriostatic water with every 5 vials
  • Card, bank transfer and alternative payment methods
  • UK‑based support that answers the same day
Browse the catalogue

Where to next

Our testing protocol

How a batch gets released

Nothing goes on sale until it has cleared all four checks and its Certificate of Analysis is published. If a lot fails, it does not get relabelled — it gets rejected.

01

HPLC purity analysis

High‑performance liquid chromatography separates the compound from any related substances and quantifies exactly how much of the sample is the peptide you ordered. We publish the full separation profile, not just the headline number.

02

Mass spectrometry identity

Purity tells you how much of something is present — not what it is. Mass spec confirms the molecular weight and sequence match the compound on the label, so a high‑purity vial of the wrong peptide never reaches you.

03

Endotoxin & sterility screening

Each lot is screened for bacterial endotoxin and microbial contamination. A batch can hit its purity specification and still carry endotoxin, which is why this is a separate test rather than an assumption.

04

Fill check & physical inspection

We confirm the stated milligram content, then inspect every vial for lyophilisation quality, seal integrity and label accuracy before it is picked. The lot number on the vial matches the COA on the site.

99%+Purity specification
4Checks per batch
100%Lots with a COA
<24hSupport response
Research questions

Frequently asked

What is a research peptide?
A peptide is a short chain of amino acids joined by peptide bonds. The compounds we list are supplied as lyophilised powders for laboratory and analytical work only. They are not medicines, foods or supplements, they are not supplied for human or veterinary use, and we do not describe or endorse any use for them beyond in‑vitro laboratory work.
How do I read the Certificate of Analysis?
Start with the lot number and check it matches the vial in front of you. Then look at three things: the HPLC purity figure and its chromatogram, the mass spectrometry result confirming identity, and whether endotoxin was tested at all — that last one is the value most suppliers quietly leave off. Every BluePeak COA carries all three.
How do the offers work?
Every single vial in the catalogue is buy one, get one free. Add one to your basket and the quantity is doubled automatically — there is no code to enter and no minimum spend. The price shown is for the pair, so the per‑vial cost is half the listed price. Bacteriostatic water is included too.
When will my order be dispatched?
Orders paid before 2pm on a working day are dispatched the same day from our UK warehouse. Card payments clear immediately. Bank transfers are dispatched once the payment lands in the account, which is usually the same day but can run to the next working morning depending on your bank.
Which payment methods do you accept?
Credit and debit card, UK bank transfer, and a number of alternative payment methods. Bank transfer is the fastest‑clearing and lowest‑friction option for larger orders; your order will sit as pending until the transfer is confirmed, at which point it moves straight to dispatch.
Do you ship outside the UK?
Yes. UK orders ship from UK stock. European and international orders are handled separately — delivery times and available compounds vary by destination, so check the product page or contact support before ordering if you need a specific arrival date.
What if a vial arrives damaged?
Email support with your order number and a photo within 60 days of delivery and we will replace it or refund you — that is our 60-day money-back guarantee. Every order is packed with protective inserts, but couriers being couriers, it occasionally still happens.
Research · Verification · Confidence

Order with the paperworkalready done

Read the Certificate of Analysis for the exact lot before you spend a penny. If a compound does not have one published, we do not sell it.

Shop All Peptides Browse COA Library

All compounds are supplied strictly for laboratory research. They are not intended for human consumption, veterinary use, therapeutic application or diagnostic procedures.

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