Synthesis. Verification. Failure protocol. Chain of custody.
No supplier should grade their own homework. The four steps below produce every Ledger Bioscience vial — from the synthesis run to the box on your bench. Each step is documented, named, and dated.
We contract synthesis to a named partner.
Ledger Bioscience peptides are synthesized at our contract synthesis partner — {{ Synthesis partner name, country }}. The partner is named on every certificate of analysis. We do not white-label peptides from anonymous suppliers, and we do not blend material from multiple sources into a single batch.
The synthesis SOPs, internal QC checklist, and batch numbering scheme are documented internally and reviewed quarterly. Each synthesis run produces a unique batch with a single batch ID — the same ID that ends up on the vial label, the COA, and this website.
An independent lab tests every batch. We pay them. They report to no one.
Once a batch is synthesized, we ship a sample to {{ Independent lab partner name, city }} for high-performance liquid chromatography (HPLC) and electrospray-ionization mass spectrometry (ESI-MS) testing. They are paid by us. They report to no one but their own results.
The lab returns a full certificate of analysis: chromatogram with retention times, peak integration table, mass spectrum with parent-ion identification, purity percentage, and the analyst's signature and date. We publish the document exactly as returned — no edits, no summary, no green checkmark.
If a batch fails QC, it doesn't get sold. It gets destroyed.
When a batch fails internal QC — wrong identity, low purity, contamination, anything — it does not get a certificate of analysis, it does not get repackaged, it does not get blended into another batch, and it does not get sold. It gets destroyed, logged, and reported on our public transparency page.
We expect to fail roughly 3% of batches over time. That is what QC is supposed to do. A vendor that never fails a batch is either testing nothing or hiding what they find.
From synthesis date to your doorstep — every timestamp is recoverable.
Every vial is labeled with its batch ID. Every order ships with the printed COA matching that batch. Tracking goes out the day the package leaves us. If you ever wanted to audit the chain of custody from the synthesis date through the QC date through the ship date to your door, every timestamp is on file.
The QR code on the vial label resolves to the product page for that compound, with the matching batch ID highlighted. Scan the code, see the batch ID match the label, see the COA right there. That's the verification loop the brand is designed for.
Three commitments. Hold us to them publicly.
If we ever fail any of the three, you can hold us to it publicly. The founder's email is in the footer.
- 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.
Read the documents. Decide for yourself.
Every product page has the latest COA. The transparency page shows what we destroyed and why.