Visioli F., Galli C., Grande S., Colonnelli K., Patelli C., Galli G., Caruso D. (2003) Hydroxytyrosol excretion differs between rats and humans and depends on the vehicle of administration. J Nutr 133:2612-5

Compound Mean content
Hydroxytyrosol 3 mg/150 mL
Oleuropein 12 mg/150 mL