Probiotics are good bacteria that grow naturally in the human gut. To date, there are no published risks associated with probiotic consumption. Nevertheless, participants will be contacted twice during the first week of each phase (probiotic and placebo) to ensure they are not experiencing any adverse side effects. In addition, participants will submit updates on their physical and mental health every two weeks throughout the study in addition to being encouraged to contact the researchers should they have any concerns during the study period.