A Certificate of Analysis is an independent lab report that verifies exactly what's in your oil – polyphenol levels, acidity, purity, and the absence of contaminants. It's the difference between a brand telling you their oil is high quality and actually being able to prove it.

Polyphenols are the naturally occurring antioxidants in olive oil responsible for most of its health benefits – including anti-inflammatory properties, heart health, and cellular protection. Most grocery store oils contain 100-300mg/kg. At 917mg/kg, Kasandrinos sits well above what's considered high quality, and well above what most oils ever reach.

It means the oil is extracted using mechanical pressure alone, without heat. Heat speeds up extraction but damages the polyphenols, antioxidants, and flavour compounds in the process. Cold pressing takes longer but keeps everything intact – which is why it matters for both taste and nutritional quality.

Every Kasandrinos bottle has a harvest date and lot number printed on the label. You can use that lot number to find the corresponding Certificate of Analysis on this page, which covers the specific batch your oil came from.

Yes. Kasandrinos is bottled in dark glass, which contains no BPA or phthalates. We also independently test for both – and publish those results here alongside our other lab reports.