Unlock 10% off your first order
Proof, not promises.
Every batch, tested by two methods and published in full — read the certificates yourself.
Proof, not promises.
Most brands test once and market that number forever. We test every batch by two methods, publish the certificates, and tell you when the number goes down. Read them yourself below.
Polyphenols fade. We won’t pretend they don’t.
This exact batch tested at 540 mg/kg at bottling. Re-tested five months later, it measured 347 mg/kg. That’s normal — and it’s exactly why we tell you to use the oil within 90 days at room temperature. A number frozen on a label the day of bottling isn’t the number in your kitchen.
Why this matters
Polyphenols are living antioxidants — they oxidize slowly from the moment the oil is pressed. Testing once and quoting it indefinitely overstates what you actually consume. We’d rather earn your trust with the real curve than a flattering headline.
Verified at three points — grove to bottle
At the grove
We sample the olives at harvest, so we know the polyphenol potential before a single bottle is filled.
At production
Cold-pressed early and tested again, to lock in and confirm what made it through pressing.
Every batch
Each production lot gets its own Certificate of Analysis — dated, numbered, and independently issued.
We run HPLC and NMR — and lead with HPLC
HPLC is the gold standard recognized by the International Olive Council: it measures each polyphenol directly. NMR can read two to three times higher for the same oil. We publish both, but we lead with the number you can actually trust and compare.
Certificates of Analysis
Independent lab reports for this batch. Open any of them — we have nothing to hide.
C2425-00262
Independent university-lab certification of biophenol content.
US 25/403 – R01
Dual-method Certificate of Analysis for this production lot.
US 25/403 – R00
Initial dual-method report for the same lot, kept on the record.
Questions about any result? We’re glad to walk you through it — get in touch.
Built to clear the bar that actually means something
Frequently asked
Why does your polyphenol number go down over time?
Polyphenols are antioxidants that oxidize slowly after pressing. A drop from 540 to 347 mg/kg over several months is expected. That’s why we date every certificate and recommend using the oil within 90 days at room temperature — so you get the real benefit, not a stale label claim.
What’s the difference between HPLC and NMR here?
HPLC directly measures each polyphenol and is the IOC-recognized gold standard; NMR infers content and can read 2–3× higher for the same oil. We run both and lead with HPLC. Full explainer →
What is the World Olive Centre certificate?
An independent, university-affiliated laboratory certification of biophenol content — an outside check on our own testing, issued at the Gold level for this batch.
Do the capsules get tested too?
Yes. Phenolia is built on verified high-polyphenol olive oil extract, and we apply the same test-and-document standard across the line. Explore Phenolia →
This is what transparency looks like.
Prove it, then sell it — on every batch, every time.
WHERE TO START
The research is the easy part.
Phenolia Daily puts the polyphenols this article describes into one HPLC-verified capsule — three Greek sources, no oil to sip, zero calories.
Shop Phenolia Daily
Phenolia Daily — Olive Polyphenol Supplement
From $45/box with Subscribe & Save