Launch offer
20% off the launch range
Every compound and every strength in the catalogue, at 20% below the normal price. Applied automatically at checkout, no code needed.
Research Use Only. Not for human or veterinary use.
For laboratories and research organisations
Every vial specified.
Down to the lot.
One compound per vial, released against its own certificate of analysis, with the lot you were sent written to your order the day it ships. The specification on a product page is what was measured for that lot — or it is blank, until someone has checked it.
- Single compound per vial
- Certificate of analysis per lot
- Priced per milligram
Purity by HPLC-UV
214 nm
Illustrative of the method. The trace for a given lot is on its certificate.
What this catalogue is
The constraints are the product.
Six commitments, and what each one rules out.
One compound per vial
A single active, at a stated strength.
Rules out: Blends and combinations
Checked before published
Specifications entered against the certificate of analysis.
Rules out: Plausible guesses
Priced per milligram
The unit a laboratory budgets in, beside the vial price.
Rules out: Bulk deals and promotions
The lot written to the order
Recorded the day it ships.
Rules out: Certificates found after the fact
Found again without a login
An order reference and email retrieve the certificate.
Rules out: Records locked behind an account
Described, not recommended
What it is, and what it has been studied for.
Rules out: Quantities and preparation guidance
- ≥98%
- purity specificationby HPLC-UV at 214 nm
- 6
- tests before releasepurity, identity, content, water, salt, appearance
- 8
- compounds cataloguedacross 5 research categories
- 1
- compound per vialno blends, no combinations
- 2
- working days to dispatchtracked delivery within the UK
From synthesis to your order
Every vial has a paper trail.
Nothing is sold on a promise. Each lot is tested before it is released, and the record follows it all the way to the order it ships against.
- 1
Synthesised as a single compound
One active per lot, lyophilised and sealed under an aluminium crimp cap.
- 2
Tested before release
Purity by HPLC-UV and identity by LC-MS, reported on a certificate of analysis for that lot.
- 3
Released against its certificate
A lot cannot be sold until its certificate is attached and checked.
- 4
Written to your order
The lot number is recorded against your order line the day it ships.
What you receive
What arrives, and what is written down
Six things, and the last three are the ones that matter in two years’ time.
One compound, lyophilised
A single active per vial at a stated strength, as a white lyophilised powder under an aluminium crimp cap. Nothing is blended, so any result obtained can be attributed to the compound it came from.
Purity reported, not restated
Purity is determined by HPLC-UV at 214 nm and the figure on the certificate is the figure measured for that lot — not the specification repeated back.
Identity and content confirmed
Identity by LC-MS against the mass calculated from the sequence; peptide content, water and residual salt determined so the mass in the vial is known rather than assumed.
A certificate per lot
Every lot is released against its own certificate of analysis. A certificate belongs to a lot, not to a compound, and a catalogue that publishes one document per product is publishing the wrong document.
The lot written to the order
Which lot shipped against which order line is recorded the day it goes out, so the analysis that released the material stays retrievable for as long as the work does.
Found again without a login
The order reference and the contact email are enough to retrieve a certificate years later. The reference is shown on the confirmation, which is why it says to keep it.
Certificate of analysis
What every certificate carries
One document per lot, issued before the lot is released. The figures on it are the ones measured for the material in your vial — not the specification restated.
- Measured, not restatedEach figure is the one obtained for that lot.
- TraceableLot number on the vial, the certificate and your order.
- RetrievableDownloadable from your order or by lot number, years later.
- Checked on arrivalSpecifications are published only once checked against it.
Certificate of analysis
Nexaflow Research Limited
- Compound
- Name, strength and fill
- Purity
- HPLC-UV, 214 nm — area %
- Identity
- LC-MS — observed vs calculated mass
- Peptide content
- Net peptide by mass
- Water content
- Karl Fischer
- Counter-ion
- Salt form and level
- Appearance
- White lyophilised powder
- Released
- Date and authorising signature
Catalogue
Sorted by what it is studied for
Five categories, each a field of research rather than a shelf. Choosing one shows what is in it.
BPC-157
10 mg
Research insight
What is being published
Retrieved from PubMed and refreshed weekly. Where a figure is open-licensed and has been checked, the card carries the article’s own figure and its credit.
Semax2026Multi-Layer Magnetic Shields Based on Fe-Based Nanocrystalline and Co-Based Amorphous Ribbons.
Liang Y, et al. · Materials (Basel, Switzerland)
Figure: Liang Y, Liu B, Ma H, Pan L, He A, Dong Y, Man Q, Li J. Materials, 2026. CC BY.
PMID 42195624
GHK-Cu2026A Systematic Review of the Mechanisms and Therapeutic Applications of GHK-Cu (Glycyl-L-Histidyl-L-Lysine-Copper Complex) in Topical Microneedle Delivery: A Case for Expanded Clinical Trials.
Najafi N, et al. · Archives of internal medicine research
Figure: Najafi N, Maatouk H, Vardanyan KG, Vartanian KB, Agrawal DK. Archives of Internal Medicine Research, 2026. CC BY.
PMID 42787770
- No figure under an open licenceTB-5002026
Peptides in Regenerative Medicine: A Comprehensive Review of Clinical Applications in Tissue Repair and Chronic Pain Management.
Luansritisakul C, et al. · Current pain and headache reports
PMID 42635865
- No figure under an open licenceRetatrutide2026
Retatrutide Once Weekly for Treatment of Obstructive Sleep Apnea.
Grunstein RR, et al. · The New England journal of medicine
PMID 42904878
- No figure under an open licenceMOTS-c2026
Mitochondria-Endoplasmic Reticulum Crosstalk in Pancreatic β-Cell Stress: A Driver of Diabetes.
Niinuma SA, et al. · Cells
PMID 42882431
- No figure under an open licenceIpamorelin2026
Therapeutic peptides in gerontology: mechanisms and applications for healthy aging.
Mavrych V, et al. · Frontiers in aging
PMID 42021992
Records are retrieved from PubMed and listed as a bibliography. Titles are reproduced as published. A citation records what has been studied; it is not a statement about the material supplied here, and nothing in this list is an indication of use.
Ordering
Four steps, and two of them are conditions
No account and no organisation details are required to order. What is required is a confirmed age and a declared use.
- 1
Confirm you are 18 or over
Once, on the first visit, and remembered by a cookie. It is a condition of supply, not a formality.
- 2
Choose the compound and the strength
Each page carries the specification as it has been verified, the vial price and the price per milligram. No account is needed to order.
- 3
Declare the use at checkout
An unticked, required confirmation that the materials are for laboratory research only. The exact wording is stored with the order.
- 4
Keep the reference
The lot supplied is recorded against the order. The reference and the email it was placed under will retrieve its certificate later.
Research Use Only. Not for human or veterinary use.
These materials are supplied to laboratories and research organisations as reagents. They are not medicines, are not supplied for administration to humans or animals, and must not be resold for those purposes.
An account is optional — it keeps order history in one place.
Create an account →
Charlie Davies
Owner, Nexaflow Research Limited
About the founder
Built to be checked, not simply trusted.
Nexaflow Research was founded in 2026 by Charlie Davies, 26, to bring a higher standard of transparency to the UK research peptide market.
Charlie started Nexaflow after seeing how much of the market runs on claims that cannot be verified: certificates that do not match the vial, blends sold as single compounds, and no way to trace a batch. Nexaflow is built the other way round — single compounds only, every lot released against its own certificate of analysis, and every order traceable to the lot supplied.
He follows the published research on peptides closely, from preclinical studies to regulatory developments, and shares the latest papers with the Nexaflow community each week. His focus is on where peptide science is heading, and on building a supplier that researchers can check rather than simply trust.
Nexaflow Research Limited · Registered in England and Wales · Company number 17487572
Traceability
A certificate belongs to a lot, not to a compound.
Which lot you were sent is recorded against your order the day it ships. An order reference and the email it was placed under will still find the analysis behind it years later.
Look up a certificate →Research Use Only. Not for human or veterinary use.
Follow new lots on Telegram
New lot releases, each certificate as it arrives, and restock updates, posted first on Telegram. No spam.
Frequently asked
Questions buyers ask
No. An order can be placed as a guest with a name, an email address and a delivery address. The order reference and the email are what a later certificate request is matched against, so keep the reference — it is shown on the confirmation and sent with it.
No. Give one if you are ordering for an institution, company or research group and it is recorded on the account and on every order placed from it.
By Pay by bank: at checkout you choose your bank and approve the payment in your banking app. No card details are entered and nothing is typed in by hand. The payment goes to NEXAFLOW RESEARCH LIMITED, the company registered at Companies House as number 17487572. The order is marked paid as soon as the payment goes through, you are emailed, and it is dispatched within 2 working days. Unpaid orders are held for 7 days, and the confirmation email carries a link to pay later.
No. Pricing is quoted per milligram alongside the vial price and does not change with the number of vials ordered. A larger fill has a lower rate per milligram because it contains more material, not because it is a promotion.
Against the lot rather than the compound. The lot number printed on the vial label can be entered into certificate lookup, or the certificate can be opened from the order in an account.
The product page gives the standard specification for the compound — sequence, formula, molecular weight and the purity it is supplied to. The values measured for the lot you receive, including its purity, are on that lot's certificate of analysis, which is linked from your order once it is dispatched.
The label states gross mass. Net peptide content — the proportion that is peptide rather than counter-ion, residual water or salts — is stated on the certificate for the lot, and is the figure to work from when preparing a solution of known concentration.