The prenylflavonoid isoxanthohumol from hops (Humulus lupulus L.) is activated into the potent phytoestrogen 8-prenylnaringenin in vitro and in the human intestine - Possemiers, S; Bolca, S; Grootaert, C; Heyerick, A; Decroos, K; Dhooge, W; De Keukeleire, D; Rabot, S; Verstraete, W; Van de Wiele, T (J Nutr, 2006)