Some OH-PCBs are more potent inhibitors of aromatase activity and (anti-) glucocorticoids than non-dioxin like (NDL)-PCBs and MeSO2-PCBs

► We investigated the effects of NDL-PCBs and their metabolites on aromatase activity and glucocorticoid receptor. ► Most NDL-PCBs and MeSO2-PCBs had no effect or were mild aromatase activity inhibitors and (anti-) glucocorticoids. ► The tested OH-PCBs were stronger aromatase activity inhibitors and (anti-) glucocorticoid than the tested NDL-PCBs or MeSO2-PCBs.