Reading a Peptide COA, Using the Freedom Diagnostics Reports on Our COAs Page
A certificate of analysis is only useful if you can connect it to a specific batch of powder. This guide explains how to read one, using the reports linked from our COAs page as worked examples. The order matters: first confirm which sample a report describes, and only then read its analytical results.
What our COAs page shows, and what it leaves to the report
The page lists 16 reports issued by Freedom Diagnostics Testing for samples from LiliPeptide. Each row gives four things: the tested sample, a batch, the test date, and a certificate link labeled with the report number. The link opens the PDF on the laboratory’s own verification site, so you read the result as the lab published it rather than a copy we retyped. The page does not repeat any purity figures or test results; for those you need to open the report. It also states plainly that each report applies only to the sample identified in it.
Five warning signs, worst first
Before reading any numbers, scan for these:
- The certificate has no batch, or its batch differs from the one on your vial.
- No laboratory is named. Testing done in-house is not an outside check.
- Purity is claimed, but there is no chromatogram and no description of the method.
- There is HPLC, but nothing from mass spec to confirm identity.
- One aging certificate is being used for a product that has been on sale for years. Compare the test date with your batch; on our page, test dates run from 5 Jun 2026 to 24 Sep 2026.
Step 1: confirm the identity block
A credible certificate opens by saying exactly what was analyzed: which compound, which batch or lot, on what date, and by which laboratory. Of these, the batch carries the most weight, since it is the field you match against your vial. A certificate that omits the batch, or that is reused for batch after batch, is decoration; it is not evidence about any particular batch.
Here is a real row from our page: BPC-157 10mg, batch LIL8032026BLU, tested 23 Sep 2026, report LILI2609210553. To use it, check that the PDF behind the link shows the same report number, names BPC-157 at 10mg and carries the same batch code, then compare that code with your vial’s label. A BPC-157 vial of another strength or batch is not covered by this report.
Step 2: watch for batch entries that aren’t lot codes
Not every row on our page has a coded lot number in the batch column, and the variation is worth knowing before you match a vial:
- Cap descriptions. Retatrutide 10mg (tested 31 Aug 2026, report Lili2608270160) gives its batch as “Clear Blue Cap”, and TB-500 10mg (tested 31 Aug 2026, report lili2608270163) gives “Clear Pink Cap”.
- A date in the batch field. Retatrutide 20mg shows “July 21, 2026” as its batch, while its test date is 15 Sep 2026 (report Lili2609140593). Keep the two dates apart.
- A short label. Retatrutide 30mg uses “RT30” (tested 5 Jun 2026, report Lili2606030201).
- One code, three samples. Batch 20260701 appears on CJC-1295 + Ipamorelin 10mg, Epithalon 50mg and SS-31 10mg, all tested 25 Jul 2026. A batch code alone therefore doesn’t identify a sample; match compound, strength and batch together.
- Two reports, one product. SS-31 10mg has two rows: batch LIL8162026BLU (tested 23 Sep 2026, report LILI2609210554) and batch 20260701 (tested 25 Jul 2026, report Lili2607220460). They describe different samples, so read the one whose batch matches your vial.
Where the batch column holds a description rather than a code, open the PDF and see how the report itself identifies the sample before you take it as matching your vial.
Step 3: read the analytical sections on the report
With identity settled, look at which tests the report lists. Our page doesn’t summarize them, and a report tells you nothing about a test it doesn’t include. These are the sections you may find, and how to read each.
Identity by mass spectrometry
Mass spec answers the question HPLC cannot: is this the right molecule? It compares the measured molecular weight with the weight expected for the sequence. For BPC-157 that is about 1419 Da, and a good result lands within roughly one dalton of the theoretical figure. Identity plus purity, meaning MS alongside HPLC, is the standard to expect.
Purity by HPLC
The chromatograph separates the sample into peaks; purity is the share of total peak area that belongs to the target. Suppose a report read 99.4%: that would mean 99.4% of what was detected is the intended peptide, with the rest mostly truncated sequences and by-products of synthesis. Look on the trace for one dominant peak, a retention time and the detector wavelength, usually 214 or 220nm. Real results tend to be specific, such as 99.42%; a round number with no chromatogram deserves suspicion.
Endotoxin, heavy metals and sterility
Endotoxins are bacterial cell-wall fragments that can confound biological assays even at trace levels, and high purity by HPLC does not rule them out. The LAL (limulus amebocyte lysate) assay gives endotoxin units (EU) per mg or mL against a stated limit; “PASSED” with the limit shown is acceptable, and a number is better. ICP-MS screens for lead, mercury, arsenic and cadmium, while sterility testing looks for viable microbes in the dry product. These matter most in long studies where contaminants build up. If a report doesn’t list one of these tests, don’t assume it was done.
If your vial’s batch doesn’t match any row, ask us through the contact page before relying on any report. For research use only. Not for human or veterinary use.
