About DefinePeps

DefinePeps supplies research peptides to laboratories, universities and independent researchers who need to know exactly what is in the vial.

The name is the standard. A compound is defined when its identity, purity and quantity are each measured and reported, not assumed from a supplier’s label. Every lot we sell is tested by an independent laboratory before it is listed, and the certificate of analysis is available on request before you order.

What we supply

Lyophilised peptides across metabolic, tissue-repair, growth-hormone-axis, neurobiology, cellular, dermal and hormone-signalling research, plus reconstitution solvents. Custom sequences and dosages are available for institutional orders.

Who we supply

Verified researchers only. Each order request asks for a research purpose and a confirmation that the compounds are for in-vitro laboratory use. We do not sell to the public and we do not offer dosing guidance of any kind.

How we are paid

By direct Bitcoin transfer, which keeps your institution’s card details out of a third-party processor and keeps our prices free of processing fees.