Peptides are now cheap to make. Their patents have lapsed and factories in China and India produce them by the tonne. What is not cheap is knowing what is in the vial. This page gathers the independent testing that already exists, explains what the tests measure, and links to the labs so you can check a batch yourself.

genetec.io does not sell peptides, does not recommend vendors and does not link to shops. Test results are information, not endorsements or medical advice. Most of these products are not registered medicines in South Africa or the United States. Speak to a registered doctor before using any of them.

Where the results come from

  • Finnrick (Austin, Texas) buys peptides and accepts anonymous samples, sends them to independent laboratories for HPLC analysis, and publishes every result. It does not sell peptides or accept payment to change ratings. Over 12,600 tests across 35 products and about 500 vendors so far. Its methodology is public.
  • Janoshik Analytical (Prague, Czech Republic) is the lab most buyers use to test a batch themselves, and one of Finnrick’s partner laboratories. Its public test list shows only the tests their owners chose to publish, mostly by sellers, so it leans towards passes. Use it to check a certificate, not to judge a market.
  • Finnrick’s other partner labs, with their published test counts and methods: finnrick.com/labs.

What a test measures

  • Identity: is it the peptide on the label? (mass spectrometry)
  • Purity: how much of the powder is that peptide, and how much is other material? (HPLC)
  • Quantity: does the vial hold the amount the label claims?
  • Endotoxin: bacterial toxins that cause fever and shock when injected. Usually an extra test.
  • Sterility, heavy metals, residual solvents: further add-on tests.

Finnrick’s default public standard (“Purity Focus”) passes a sample when purity is at least 99.5% and the fill is within 35% of the label. That bar is strict: a sample can fail it and still be mostly the right peptide. A pass does not mean a product is safe or effective, only that the powder matched its label on the day it was tested. Identity and purity tests do not detect endotoxin unless that test was ordered.

Check a certificate yourself

  • Certificate PDFs can be faked or edited. Always check them at the lab that issued them.
  • Finnrick certificates: finnrick.com/verify.
  • Janoshik certificates: find the test number on public.janoshik.com and check that the product, the amounts and the verification key match the certificate you were given. A certificate with the key or QR code removed, or a test number that belongs to a different product, should be treated as fake.
  • Results a seller publishes about itself are not the same as results from samples bought anonymously. Prefer the second kind.
  • A certificate covers one batch. A different batch from the same seller is a different product until it is tested.

Research-grade and GMP peptides

Not every peptide comes from the grey market. Established manufacturers such as GenScript (founded in New Jersey, with its main production in Nanjing, China) make custom peptides to order for laboratories and drug companies. They offer research grade and, for clinical trials, GMP grade (Good Manufacturing Practice, where the whole production process is documented and controlled, not only the final vial). These suppliers sell to institutions, not to the public. A research-grade peptide is not a medicine, and a manufacturer’s own certificate is still worth checking with an independent test.

Peptide Testing Daily

We publish a short daily summary of new public test results, product by product, with a plain-language comment on what they mean. Each figure links back to its source. Read the daily posts; the first issue is the baseline of 24 October 2026.

Why this matters

Independent testing is doing privately what a medicines regulator does at great cost: checking that a batch is what it claims to be. The weak point is that testing gets rarer as the market grows. The goal here is the opposite: every batch tested, every result public, failures included. Later the same approach will extend to antibodies and gene-therapy vectors.