In addition, there were possible interactions between PCPPCs in the mixture; particularly, bi-interactions were observed between MBzP and each of MCOP, MeP, MiBP, MEHHP, MCPP, BPA, and 2, 5-DCP; MCOP and each of MiBP, MiBP, MeP, MEHHP, MCPP, BPA, and 2, 5-DCP; MeP and each of MiBP, MEHHP, MCPP, BPA, and 2, 5-DCP in females, and some of these bi-interactions were observed in participants with no general obesity and those with abdominal obesity, leading to increased synergistic effects of the combined chemicals. This evidence concerns the gene NMRK2 and Abdominal obesity.