We sell paperwork. The peptide comes with it.
Ledger Bioscience is a research peptide company built for independent researchers who got tired of clicking "Request COA" and getting back a PDF from a different year.
The category was running on adjectives.
The research peptide market runs on trust signals it has not earned. Recycled certificates of analysis. "Pharmaceutical-grade" claims with no defined standard. Anonymous founders. Stock-photo lab images. The whole category is structured to make verification hard.
We started Ledger Bioscience because we believed verification could be the product. Not the compound — the compound is the same compound any competent synthesis lab can produce. The product is the documentation: a fresh, dated, third-party COA on every batch, a batch number printed on every vial, a real address on the return slip, and a real human in the inbox.
We are betting that if you build the documentation infrastructure first, the brand follows.
Four steps, all named.
Synthesis
Our peptides are synthesized at {{ named contract synthesis partner, country }}. The synthesis process, the SOPs, and our QC checklist are documented internally and reviewed quarterly. We do not white-label peptides from anonymous suppliers.
Independent verification
Every batch is shipped to {{ independent lab partner }} in {{ city }} for HPLC and mass spectrometry testing. They are paid by us. They report to no one but their own results. We publish the COA they return, exactly as they returned it.
Failure protocol
When a batch fails — wrong identity, low purity, contamination, anything — it does not get a COA, it does not get repackaged, and it does not get sold. It gets destroyed, logged, and reported in our public transparency log. We expect to fail roughly 3% of batches. We would rather destroy product than sell something we cannot stand behind.
Shipping and chain of custody
Every vial is labeled with its batch ID. Every order ships with a printed COA. Tracking goes out the day the package leaves us. If you wanted to audit the chain of custody from synthesis date to your doorstep, we could give you the timestamps.
Real names. Real inboxes.
Ledger Bioscience is currently {{ N }} people. We are not a marketplace, a reseller, or a brand-licensing operation.
The founder is {{ Sebastian Ziolkowski }}. The co-founder and head of sales and support is {{ Brittany Crnich }}. The customer service inbox at research@ledgerbioscience.com is read by a real person with a chemistry background, who answers questions in plain English.
Our LinkedIn profiles are real. Our location is real. Our return address is real. Anonymity is for the products we don't carry.
Three commitments. Signed.
Three things we commit to. If we fail any of them, you can hold us to it publicly.
- Every product has a third-party COA, dated within the current quarter, before it goes on sale. If a COA is older than 90 days, the product is delisted until a fresh batch is tested.
- Every claim on this site can be traced to a document. If you find one that can't, email research@ledgerbioscience.com and we will either prove it or remove it within seven days.
- Every batch that fails internal QC is destroyed and logged. We will never sell a batch that did not pass.
Signed: {{ Sebastian Ziolkowski }}, founder, Ledger Bioscience.
For journalists, partners, and researchers writing about us.
Press inquiries: email the founder directly at founder@ledgerbioscience.com. We are happy to walk a journalist through the synthesis-to-shelf chain of custody, send copies of the COAs we have published, or share what we have destroyed and why. If you write about the research peptide category, we will be the easiest interview you do this year.
Researcher inquiries: research@ledgerbioscience.com. Partnership inquiries: partners@ledgerbioscience.com.
Read the documents. Then decide.
Every promise on this page is checkable on the catalog page, the COA page, and the transparency page.