Background: Breast and prostate cancer are frequently diagnosed neoplasias in women and men around the world. The signaling of the androgen receptor (AR) influences the development of both tumors. Since therapies focused to block the receptor's activity have not been fully effective, and have shown side effects, therapies based on natural compounds are promissory complementary alternatives in its treatment. Objective: The aim of this study was to determine the effect of anthocyanins from blue corn in cancer cell lines. Methods: We analyzed the antiproliferative effect of anthocyanins from raw and alkali-processed (tortillas) Mixteco blue corn in breast and prostate cancer cell lines MDA-MB-453 (subtype: triple negative) and LNCaP using methyltiazlyl-tetrazolium (MTT) and flow cytometry (FCM). The combination of anthocyanins and 2-amino-N-quinolin-8-yl-benzenesulfonamide (QBS) or nocodazole also were evaluated. The anthocyanins were isolated trough column chromatography (XAD-7).Results: Our results demonstrated that anthocyanin specially the ones obtained from tortillas, decreased cell viability and arrested cell cycle in G1 phase inducing apoptosis. Cytometry analysis shows an increased effect on apoptosis of MDA-MB-453 and LNCaP cells when tortilla anthocyanins and QBS were combined. Conclusions: This is the first report that suggest that anthocyanins from blue corn have an effect in cell cycle and viability so they could serve as adjuvants for breast and prostate cancer therapies and may prompt to deepen investigations to decipher its molecular properties. AbbreviationsARAndrogen ReceptorCIDIIRInterdisciplinary Center for Research on Integral Regional DevelopmentDHT5α-DihydrotestosteroneEREstrogen ReceptorPRProgesterone ReceptorQBSAmino-N-quinolin-8-yl-benzenesulfonamide.