This comes first on purpose. Reading a lab report is the skill that makes every later move work. You cannot trace a source, grade a seller, or set a dose correctly until you can read the document that proves what is in the vial.
An independent lab report, the COA, is the single most important document in this entire process. It is the third party, the one with no stake in selling you anything, telling you what is actually in a given batch. Most buyers read the purity number and stop. You are going to read the whole thing, and learn to tell a real one from a fake.
The report, line by line
| Line on the report | What it actually tells you |
|---|
| Test / accession ID | The lab's unique code for this exact test. This is your verification handle. If there is no code you can look up, treat the report as fiction. |
| Sample name | The compound and its label claim. Confirm it matches what you intend to buy, exactly. |
| Maker / submitted by | Who produced or sent the sample. This is the thread you pull on in Move Two to find the actual source. |
| Batch / lot | The specific production run tested. A report only vouches for its own batch. Same seller, different batch, is a fresh unknown. |
| Purity | Share of the material that is the real compound. You want it in the high 90s. |
| Measured content | The actual amount found in the vial. Your dose math runs off this number, not the label. |
| Method | How it was tested. An identity confirmation by mass spectrometry is stronger evidence than a purity figure alone. |
Two numbers, not one: purity and fill
Purity and content answer different questions, and you need both. Purity says "how clean," content says "how much." A vial can be 99% clean and still hold more or less compound than the label promises. A label that reads "20mg" with a measured 22mg has roughly a 10% overfill, you got extra. Read that way, "99% pure, 10% overfill" is two separate good facts. The reason this is not academic: your dose is calculated from the measured content, not the printed label. When you have a report, mix against its number.
Telling a real report from a planted one
Never trust a file the seller hands you
A report sent to you over chat or email can be edited, lifted from a different batch, or built from scratch. The only report worth anything is one you pulled yourself. Take the test ID off it, go to the testing lab's own lookup page (for a Janoshik report, its public verification page), and confirm it there. If the ID does not resolve, or the figures on the lab's site differ from the file you were sent, that is your answer. Walk.
The mixed-data trap that fools veterans
There is a quieter failure than a faked PDF. Aggregator sites that pool and "rank" results group them by batch number. When different makers use sloppy or overlapping batch formats, one seller's listing can silently swallow another's results, the good and the bad alike. A source ends up looking cleaner, or dirtier, than it really is, because the data underneath is tangled.
A name to know: Finnrick
Finnrick is a widely cited aggregator that pulls test results together into source scores. It has drawn mixed reviews on exactly this problem, results grouped by inconsistent batch formats, so different vendors' products can end up combined under one listing. Because of that, its consistency has come into question and many experienced buyers now trust it less as a standalone verdict. Use it, if at all, as one input to investigate further, never as the final word. The reliable signal is still a single traceable test you confirmed on the testing lab's own site.
- Trust only what you can trace to one maker, one batch, confirmed on the testing lab's own portal (such as Janoshik), not an aggregator's combined view.
- Distrust any aggregate "score" you cannot break back down to a single traceable test.
- When the stakes are high enough, the strongest proof of all is a test you commissioned yourself, holding the sample from your hands to the lab without it leaving your control.