Research peptide pens. Pre-filled. Calibrated.
No powder to reconstitute. Every cartridge arrives pre-mixed inside the Celyfe precision pen, HPLC-verified to 99%+ purity, and ships cold with its Certificate of Analysis.
4
pre-filled pens, singles and blends
99%+
purity, verified per batch
1 to 2 days
Prepared and dispatched by our team
Free
EU shipping over $199
Catalogue
Every pen, colour-coded.
Showing 4 of 4 products. Prices include 20% VAT, excluding shipping.
Blends
More than one compound per pen
The format
Pre-filled, not powder.
Almost every research peptide sold in the UK ships as a freeze-dried powder that has to be reconstituted before it is any use at the bench. Ours do not. Each Celyfe cartridge leaves our facility already in solution, sealed inside the pen, labelled with its batch number and packed cold.
- 01
No reconstitution step
No bacteriostatic water to source, no reconstitution volume to work out, no transfer between vials - and so none of the handling in which a research-grade compound is most often diluted wrongly or contaminated.
- 02
Verified batch by batch
Each batch is tested by HPLC at an independent laboratory. The certificate for your batch - compound, batch ID, purity, test date - is published on the product page.
- 03
The trade-off is the cold chain
A peptide already in solution is less forgiving than a powder, so every order ships in a sealed foil pouch with ice packs and the pen belongs in a fridge at 2 to 8 °C on arrival, never a freezer.
Operating principles
Small volume.
Big biology.
Billions of years of R&D, still running. We build instruments for the people who study it.
- 01
Small volumes. Repeatable. Documented.
A calibrated click removes the bench arithmetic. The same volume, the same way, every time.
- 02
You cannot manage what you do not measure.
Every batch is measured by HPLC and the number on the certificate is the number in the cartridge.
- 03
Built like a lab. Not like a trend.
Every pen, its own batch certificate, one format. If a compound cannot be documented to that standard we do not sell it.
Cold chain
How your order travels
Every order goes out in a sealed foil pouch with ice packs, inside a plain box with nothing printed on it. The pens hold temperature for about a week, so a parcel that runs late still arrives fine.
How we ship
Chilled
Frozen gel packs inside a sealed foil pouch hold temperature for roughly seven days in transit.
Insulated
The pouch sits inside a wool-lined envelope, so the cold chain survives a normal courier journey.
Discreet
Plain outer box with no branding and nothing on the label that names the contents.
Third-party batch testing
Each batch is tested by an independent laboratory and the Certificate of Analysis is published on the product page.
Cold chain on every order
Sealed foil pouch and ice packs on every order, inside a plain outer box.
Research use only
Supplied strictly for in-vitro laboratory research. Not for human or animal consumption.
Reference
The guides behind the catalogue
What each compound is, what the published literature examines, and how the paperwork works. We write about the compounds and the documentation, never about use or protocols.
- What are research peptides?
- Are peptides legal in the UK?
- Are peptides legal in the US? (2026 FDA status)
- Are peptides legal in Australia? (2026 TGA status)
- What is a certificate of analysis?
- How to store research peptides
- Buying research peptides in the UK: a buyer's checklist
- Bacteriostatic water and peptide stability
FAQ
Ordering, shipping and storage
Questions about the compounds themselves are covered in our research guides.
Peptides are short chains of amino acids, the same building blocks that make up proteins, joined by peptide bonds. Research peptides such as BPC-157, TB-500 and GHK-Cu are synthesised to a defined sequence and purity for use in controlled, in-vitro laboratory studies. Every compound we supply is intended strictly for research use, not for human or veterinary consumption.
COA library
Read the lab report before you order
The COA library holds recent batch reports for every pen we fill, with purity and identity for each one.