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

Urine analysed after enzymatic deconjugation

Cumulative Excretion in Urine (µg)
Number Dose Multiple Dose Duration Time (hours) Metabolite
0 24
1 500 µL Single Dose 16.5 35.7
2 500 µL Single Dose 8.1 17.2
Homovanillyl alcohol