The objective of this study was to test whether consumption of cruciferous or cruciferous plus apiaceous vegetables altered serum concentrations of interleukin ( IL ) -6 , IL-8 , C-reactive protein ( CRP ) , tumor necrosis factor ( TNF ) , and soluble TNF receptor ( sTNFR ) I and II , and whether this response was GSTM1/GSTT1 genotype dependent .