In a randomized crossover trial , healthy men ( n = @ ) and women ( n = @ ) aged @-@ y consumed @ @-d controlled diets : basal ( vegetable-free ) , single-dose cruciferous ( @xC ) -LSB- @ g vegetables/kg body weight ( BW ) -RSB- , double-dose cruciferous ( @xC ) ( @ g/kg BW ) , and cruciferous plus apiaceous ( carrot family ) ( @xC + A ) vegetables ( @ and @ g/kg BW , respectively ) , with a @-d washout period between each intervention .