Polyphenols are naturally occurring plant antioxidants found in olives, fruits, nuts, and spices. In olive oil, the key polyphenols -- oleocanthal, hydroxytyrosol, and oleuropein -- have been clinically shown to fight inflammation, support cardiovascular health, improve brain function, regulate blood sugar, and slow cellular ageing. Oleocanthal, which gives Kosterina EVOO its distinctive peppery throat sensation, has demonstrated anti-inflammatory effects comparable to a low dose of ibuprofen in peer-reviewed research. The EU authorises an official health claim for olive oils with 250+ mg/kg polyphenols. Kosterina Original EVOO has 500+ mg/kg -- well above the threshold.