Visioli F., Caruso D., Galli C., Viappiani S., Galli G., Sala A. (2000) Olive oils rich in natural catecholic phenols decrease isoprostane excretion in humans. Biochem Biophys Res Commun 278:797-9

Compound Mean content
Hydroxytyrosol 2 mg/100 ml
Oleuropein 25.2 mg/100 ml
Polyphenols, total 487.5 mg/L