Figure 2.
Accumulative recovery (%) of polyphenols during in vitro gastrointestinal digestion: (a) oleuropein aglycone, oleuropein diglucoside, and 10-hydroxyoleuropein aglycone; (b) hydroxyl-oleuropein and metoxyoleuropein; (c) oleuropein and isomers 1 and 2; (d) ligstroside and elenolic acid; (e) quercetin, quercetin-galactoside, luteolin, and luteolin-glucoside; (f) hydroxytyrosol and hydroxytyrosol glucoside; (g) loganic/epiloganic acid and oleoside.

