CYP19A1 and breast cancer: In view of the anti-estrogenic and aromatase inhibitory activities of quercetin, naringenin and naringin isolated from citrus peel extracts, this study proposes exploiting citrus peels in isolating natural phytochemicals for possible incorporation in chemotherapy regimens tailored for premenopausal and postmenopausal breast cancer patients based on the efficacy and safety profiles they possess.