Research use resources
How to read a lab report for a peptide blend
A blend is one vial with more than one compound in it. Its lab report has more to show than a report for a single compound: an amount for each compound, one trace with several main peaks, and a total for the whole vial. This guide covers what a blend report should show and how to check one, with our three blend reports as examples. For the basics of any report, see How to read a peptide lab report.
The short version
The total is the easiest number to read and the least useful on its own.
What’s different about a blend report
A lab tests a blend with the same methods it uses for a single compound: HPLC for purity and amounts, mass spectrometry (LC-MS) for identity, and often an endotoxin screen. The difference is that one sample holds several compounds, so most results come in parts:
- Content: an amount for each compound, next to its amount on the label, plus the total of all of them.
- Purity: one figure for the blend. Our reports call it blend average purity.
- Identity: the lab confirms the vial holds the compounds named for the blend.
- The trace: one main peak for each compound, each marked with its name.
One trace, one peak for each compound
HPLC separates the compounds in a sample as they pass through a column. Each compound comes out at its own time, so a blend of three compounds shows three main peaks. Small peaks around them are anything else in the sample.
Two things to look for. The main peaks should stand apart, with flat baseline between them: if two of them run together, the lab can’t measure each one cleanly. And don’t judge amounts by peak height. Each compound absorbs the detector’s light differently, so the same amount of two compounds can give peaks of different heights. In our Wolverine Blend report, BPC-157 and TB-500 are both 10 mg on the label and TB-500 measured a little more, yet its peak is the shorter one. The amounts come from the content table, not from the height of the peaks.
Check each compound, not just the total
A blend report usually gives a total for the vial. On our reports, that total is the sum of the compound rows, so you can check it by adding them up. But a total can look right while one compound is short, because a larger one can make up the difference.
So compare each row with its own label amount. Filling small amounts of powder is never exact, so expect each compound to land a little above or below its label rather than on it. A compound far below its label is the thing to look for, and only the rows show it.
Our three blend reports
All three come from Kovera Labs and were tested in September 2026 with the same method: reversed phase HPLC on a C18 column with detection at 214 nm, LC-MS for identity, and an endotoxin screen. Each is linked on its product page under Lab results.
KLOW
Four compounds, 80 mg on the label. Blend purity 99.436%. Total measured 85.57 mg (107.0% of the label). Endotoxin screen: pass. Report KVR-2026-832855.
| Compound | Label | Measured | Of its label |
|---|---|---|---|
| GHK-Cu | 50 mg | 53.48 mg | 107.0% |
| KPV | 10 mg | 10.24 mg | 102.4% |
| BPC-157 | 10 mg | 11.17 mg | 111.7% |
| TB-500 | 10 mg | 10.68 mg | 106.8% |
GLOW
Three compounds, 70 mg on the label. Blend purity 99.661%. Total measured 75.30 mg (107.6% of the label). Endotoxin screen: pass. Report KVR-2026-FDAA92.
| Compound | Label | Measured | Of its label |
|---|---|---|---|
| BPC-157 | 10 mg | 10.86 mg | 108.6% |
| TB-500 | 10 mg | 10.23 mg | 102.3% |
| GHK-Cu | 50 mg | 54.21 mg | 108.4% |
Wolverine Blend
Two compounds, 20 mg on the label. Blend purity 99.614%. Total measured 21.40 mg (107.0% of the label). Endotoxin screen: pass. Report KVR-2026-CB1C79.
| Compound | Label | Measured | Of its label |
|---|---|---|---|
| BPC-157 | 10 mg | 10.34 mg | 103.4% |
| TB-500 | 10 mg | 11.06 mg | 110.6% |
In all three tested vials, every compound measured at or above its label amount, from 102% to 112%. Like any content result, these describe the vials that were tested; other vials can land a little above or below. For more on the difference between purity and content, see Purity vs content: the two numbers on a lab report.
What to check on a blend report
- The blend name and total amount on the report match your vial.
- Every compound on the label has its own row, with a label amount and a measured amount.
- Each measured amount is close to its own label amount.
- The rows add up to the total.
- The trace shows a separate main peak for each compound.
- Identity is confirmed by mass spec, and the report names the lab and gives a report number.
Common questions
Why does a blend report give one purity for the whole vial?
The compounds are measured together in one run, so our reports give the blend’s purity as one figure across its compounds. Read it with the trace: clean main peaks with little between them mean little of anything else.
Is a blend tested differently from single vials?
The methods are the same. A single compound gets one amount and one main peak; a blend gets one of each for every compound, all from the same sample.
Where do I find the report for a blend?
On the product page under Lab results, and on our research materials page, which lists them all. If you need documentation for a lot that isn’t listed, contact us.
A report records what a lab measured. It doesn’t approve a material for any use. Our products are sold for laboratory research only, not for human or animal use.