Checked twice,
before it's yours.
Every batch at Thepenpeptide UK goes through two tests before it's put up for sale. If it doesn't pass, we don't sell it.
Where it comes from
We buy from experienced peptide makers and keep each batch separate the whole way through. Each pen comes from just one batch, so its test results really are about the pen in your hand.
Our Products
Vetted Manufacturers
We partner only with trusted, qualified suppliers.
Strict Quality Control
Manufacturing processes are monitored to ensure consistency.
Batch Traceability
Each batch can be traced from source to final product.
Research Grade Only
All products are for research use only. Not for human consumption.
Lab VerifiedThe two tests
First, HPLC: it separates the sample to show how pure it is. Second, mass spectrometry: it weighs the molecule to confirm it's the right compound. Both results go on the batch's certificate, which we publish before we sell a single pen.
See it for yourself
You don't have to trust us. Type the batch number from your label into our COAs page and read the results.
Learn More About Us
Support the Research Community
Promote Transparency in the Industry
Maintain the Highest Quality Standards