HOW TO READ A COA WITHOUT A CHEMISTRY DEGREE
Every real product leaves receipts. In this game, the receipt is the COA: the Certificate of Analysis. It's the lab report on the exact batch in your hand. No COA, no trust. Simple.
It looks like a tax form. It's not that deep. Five things to check and you're done.
1. DOES THE BATCH MATCH?
This is the one that matters most. Every COA is tied to one batch, usually called a batch, lot, or sample ID. Flip your package over. Find the batch code. Now find it on the COA.
Match? You're reading the right report. No match? That COA belongs to some other product's story, not yours.
2. WHO TESTED IT, AND WHEN?
Look for the lab's name and the test date up top. You want a third-party lab, not the brand grading its own homework. Look for "ISO 17025" on the report too. That's the international standard labs get accredited to, and it means somebody checks the checkers.
Fresh test dates beat old ones. A report from three years back on a product that came out last month? Side-eye.
3. THE THC NUMBERS, DECODED
Here's where people get lost. You'll usually see three rows:
- Delta-9 THC. The THC that's active right now.
- THCA. The raw form. It turns into Delta-9 when you heat it: spark it, vape it, bake it.
- Total THC. Both of those added up, the honest way.
The math labs use: Total THC = Delta-9 THC + (0.877 × THCA). That 0.877 is there because THCA loses a little weight when heat flips it into THC. So 20% THCA doesn't become 20% THC. It becomes about 17.5%.
Flower usually reports in percent. Gummies, drinks, and tinctures usually report in milligrams, per piece or per package. Check which one you're looking at before you do any victory laps.
4. ND, LOD, LOQ: THE ALPHABET SOUP
Every lab report speaks this language. Here's the translation:
- ND (Not Detected). The lab looked and found nothing it could measure. For the bad stuff, ND is the dream.
- LOD (Limit of Detection). The smallest amount the lab's gear can even see.
- LOQ (Limit of Quantitation). The smallest amount it can put an exact number on.
- MU (Measurement Uncertainty). The plus-or-minus. No lab is perfect, so a good one tells you how close its number is.
Every lab prints its own key, usually at the bottom of the report. If a term looks weird, check the key. That's what it's there for.
5. WHICH TESTS WERE RUN?
Potency is just the headline: how much THC and friends. The full story is the safety panels:
- Heavy metals: lead, arsenic, cadmium, mercury.
- Pesticides: what was sprayed on the plant.
- Microbials: mold, yeast, and bacteria.
- Residual solvents: what was left behind from extraction.
Some COAs only run potency. Others run the full panel. Look for the "Panels Run" section, or a pass/fail next to each test. More panels, more receipts.
Units change by test, too. Cannabinoids in percent, contaminants in ppm (parts per million), microbes in CFU/g (colony counts per gram). Different rulers for different jobs.
BONUS: SCAN THE QR
A lot of COAs carry a QR code. Scan it. It should land on the lab's own site, showing the same report. If the QR goes nowhere, or the numbers don't match what's printed, that's your sign.
WHERE ARE OURS?
Right here, out in the open. Every Underdogs Lab COA lives in one library, sorted by brand, newest first. Pull up your product, match your batch, read the receipts. Nada que esconder.
QUICK HITS
Is Total THC the same as Delta-9 THC?
Nah. Total THC adds in the THCA (times 0.877). Delta-9 is only the part that's already active.
What does "dry weight" mean?
The number with the water weight taken out, so wet flower and dry flower get measured on the same scale.
Can I ask for a COA?
Always. Any brand worth your money has it ready. If they dodge the question, you've got your answer.
The Dog Says: "Trust is earned. Receipts are printed."
