A Certificate of Analysis (COA) is the laboratory record for one specific lot, and it describes only that lot. Ageless Peptides vial labels do not carry a lot number. Each label carries its own serial number (S/N) and a Scan for COA code, and each serial number is linked to the lot the vial came from.
Fields on an Ageless Peptides COA
Fields the laboratory did not report are left off the COA rather than estimated.
| Field | What it tells you | What to check |
|---|---|---|
| Product and lot number | Which material was tested | The product matches the vial label, and the lot is the one your vial's serial number is linked to |
| Laboratory and report number | Who ran the tests, and which report | Laboratory name and report number are shown |
| Test date | When the sample was analysed | The date is shown |
| Purity (RP-HPLC) | The main peak's share of total peak area at the stated UV wavelength | The percentage, the method and the wavelength (nm), with the chromatogram in the full report |
| Identity | Whether the lab confirmed the expected molecule, and by which method (for example mass spectrometry) | "Confirmed" or "Not confirmed", the method, and the observed mass (Da) against the molecular weight on the compound reference |
| Net peptide content, where reported | The share of the powder mass that is peptide | Reported separately from HPLC purity |
| Endotoxin, where reported | The endotoxin test result | The result and its units |
HPLC purity is not net peptide content
HPLC purity compares the main peak with the other UV-absorbing components in the sample. It does not measure water, counter-ions such as acetate or trifluoroacetate, or other material that does not absorb at the test wavelength. Net peptide content measures how much of the powder is peptide. A lot can show high HPLC purity and a lower net peptide content, and the two numbers answer different questions.
Matching the mass result to the right form
Some compounds exist in more than one form, and the expected mass depends on the form. GHK-Cu (the copper complex) and GHK (the free tripeptide) have different masses, and 5-Amino-1MQ is supplied as an iodide salt whose cation has a different mass from the salt. Check the observed mass against the form named on the label.
Red flags on any COA
- No lot number on the COA, or a lot that is not the one your vial's serial number is linked to.
- A purity figure with no chromatogram or no stated method.
- Purity reported without any identity test.
- The same COA used for several lots.
- No laboratory name or report number.
Where to find the COA for your lot
- Scan the code on the vial label and enter the serial number to see the certificate for that vial's lot.
- Signed-in customers see the COA for the lot each order item shipped from.
- The product page shows the COA for the current lot.
Research use only
COAs describe analytical results only. They are not a statement of safety or suitability for any human or veterinary use.
