We built the part most vendors skip.

NorCal Peptide Research exists because the easiest part of this business is sourcing inventory, and the part most vendors quietly skip is proving what they're selling matches what they claim. We built the company around the second part.

What "research use only" means here

Every compound we supply is sold strictly for laboratory and in-vitro research purposes. We are not a pharmacy, we do not provide dosing guidance, and we do not market these products for human or animal use. This isn't a legal disclaimer we paste at the bottom of the page and otherwise ignore — it shapes how we write product descriptions, what we will and won't say in customer conversations, and who we choose to sell to.

Independent testing, every batch, no exceptions

Every batch we bring in is sampled and sent to Janoshik Analytical for independent LC-MS testing before it's listed for sale. We don't reuse old reports against new inventory, and we don't list anything we haven't personally had tested under our own lot numbers. The full archive lives in our public COA Library.

Why we publish everything instead of emailing it on request

A report you have to ask for is a report that's easy to quietly stop sending once something goes wrong. We publish every COA in a public library, indexed by lot number, the moment it's available — not when a customer happens to ask. If we ever fail to publish a report for a batch we sell, that absence should be the first thing you notice.

Who we are

NorCal Peptide Research LLC is based in Northern California. We're a small, independent operation — not a reseller hiding behind a brand name, and not a manufacturer claiming credentials we don't have. We source from established suppliers, verify independently, and document the chain so you don't have to take our word for it.