5. Conclusions
The mechanism by which probiotics modulate the mood is still to be clarified; however, growing evidence suggests that probiotics influence the gut–brain axis.The aim of the present study was to further investigate the efficacy of the two probiotics strains in a transitory stress condition, i.e., the postpartum period. In this case, early PPD could be considered as a novel condition to explore, considering its high prevalence in developed countries. Our study provides evidence that the administration of a probiotic supplement containing 