2.5. Intervention
At the beginning of the intervention period (V1), the participants were requested to follow their routine lifestyle activities over the following 60 days, and their observations were followed by a study-specific monitoring questionnaire. The probiotic group (PRO) received one capsule containing the probiotic mixture powder in the amount of 3 × 10The optimal probiotics strains and dosages, intervention length and outcome measures were selected based on our previous investigation [