A composition comprising a mixture M comprising or, alternatively, consisting of: - a bacterial strain identified as Bifidobacterium bifidum MIMBb23sg and deposited at Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH (DSMZ) under deposit number DSM 32708 on 4 December 2017 by Sofar S.p.A; and - at least one bacterial strain selected from the group A comprising or, alternatively, consisting of: - a bacterial strain identified as Bifidobacterium breve BbIBS01 and deposited at Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH (DSMZ) under deposit number DSM 33231 on 31 July 2019 by Sofar S.p.A., - a bacterial strain identified as Bifidobacterium breve BblBS02 and deposited at Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH (DSMZ) under deposit number DSM 33232 on 31 July 2019 by Sofar S.p.A., - a bacterial strain identified as Bifidobacterium animalis subsp. lactis BIIBS01 and deposited at Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH (DSMZ) under deposit number DSM 33233 on 31 July 2019 by Sofar S.p.A., - a bacterial strain identified as Lactobacillus plantarum LpIBS01 and deposited at Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH (DSMZ) under deposit number DSM 33234 on 31 July 2019 by Sofar S.p.A., and mixtures thereof; and, optionally, said composition comprises at least one food or pharmaceutical grade additive and/or excipient. a mixture M comprising or, alternatively, consisting of: - a bacterial strain identified as Bifidobacterium bifidum MIMBb23sg and deposited at Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH (DSMZ) under deposit number DSM 32708 on 4 December 2017 by Sofar S.p.A; and - at least one bacterial strain selected from the group A comprising or, alternatively, consisting of: - a bacterial strain identified as Bifidobacterium breve BbIBS01 and deposited at Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH (DSMZ) under deposit number DSM 33231 on 31 July 2019 by Sofar S.p.A., - a bacterial strain identified as Bifidobacterium breve BblBS02 and deposited at Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH (DSMZ) under deposit number DSM 33232 on 31 July 2019 by Sofar S.p.A., - a bacterial strain identified as Bifidobacterium animalis subsp. lactis BIIBS01 and deposited at Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH (DSMZ) under deposit number DSM 33233 on 31 July 2019 by Sofar S.p.A., - a bacterial strain identified as Lactobacillus plantarum LpIBS01 and deposited at Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH (DSMZ) under deposit number DSM 33234 on 31 July 2019 by Sofar S.p.A., - a bacterial strain identified as Bifidobacterium bifidum MIMBb23sg and deposited at Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH (DSMZ) under deposit number DSM 32708 on 4 December 2017 by Sofar S.p.A; and - at least one bacterial strain selected from the group A comprising or, alternatively, consisting of: - a bacterial strain identified as Bifidobacterium breve BbIBS01 and deposited at Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH (DSMZ) under deposit number DSM 33231 on 31 July 2019 by Sofar S.p.A., - a bacterial strain identified as Bifidobacterium breve BblBS02 and deposited at Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH (DSMZ) under deposit number DSM 33232 on 31 July 2019 by Sofar S.p.A., - a bacterial strain identified as Bifidobacterium animalis subsp. lactis BIIBS01 and deposited at Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH (DSMZ) under deposit number DSM 33233 on 31 July 2019 by Sofar S.p.A., - a bacterial strain identified as Lactobacillus plantarum LpIBS01 and deposited at Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH (DSMZ) under deposit number DSM 33234 on 31 July 2019 by Sofar S.p.A., and mixtures thereof; and, optionally, said composition comprises at least one food or pharmaceutical grade additive and/or excipient.