The researcher and supervisor will schedule a meeting with each participant to provide detailed instructions for the study and to obtain informed consent for each participant's continuation in the study (see Appendix F and Appendix G). At the initial appointment, the ten-week appointment, and the final twenty-week appointment, participants will complete the Depression Anxiety and Stress scale (DASS) and the Anxiety Sensitivity Index (ASI). Participants will complete these measures three times during the study period in order for the researchers to measure change in anxiety and depression symptoms across the three time points. At each of these meetings participants will also be given their bottle of either probiotics capsules or placebo capsules to be taken over the 10-week period. At their ten-week appointment, participants will also be given copies of the DASS and ASI to be completed at the end of the study (see Appendix H). At the third and final appointment, participants will bring in their completed questionnaires and be given the opportunity to ask any questions they may have about the study, as well as complete a ballot for the prize draws. If they wish to know during which phases they received the probiotic and placebo capsules, they will be told that the information will be emailed to them once the study is complete.