Assertion: grape juice's effect | /r/HasProperty | suggested as a marker of warfarin
Facets:
Source sentences:
text: In vitro studies demonstrate an effect on cytochrome P450 (CYP-450) 2C9 and 3A; however, no effect on flurbiprofen (suggested as a marker of warfarin) was found for CYP2C9,Greenblatt 2006 and grapes were less inhibitory than grapefruit on CYP3A activity.