Caruso D., Visioli F., Patelli R., Galli C., Galli G. (2001) Urinary excretion of olive oil phenols and their metabolites in humans. Metabolism 50:1426-8 PubMed (12888646)

Compound Mean content
Oleuropein 79 mg/100 ml
Hydroxytyrosol 14.2 mg/100 ml