Miro-Casas E., Farre Albaladejo M., Covas M.I., Rodriguez J.O., Menoyo Colomer E., Lamuela Raventos R.M., de la Torre R. (2001) Capillary gas chromatography-mass spectrometry quantitative determination of hydroxytyrosol and tyrosol in human urine after olive oil intake. Anal Biochem 294:63-72 PubMed (11412007)

Compound Mean content
Hydroxytyrosol 6 µg/mL
Tyrosol 6.4 µg/mL