Study on the Enhancement of Intestinal and Immune Functions Through Probiotic Intervention

Dietary supplement: Probiotics. The trial period of this study lasts for 2 months (8 weeks), during which each participant will have 3 visits (at month 0, month 1, and month 2).

Dietary supplement: Placebo. The trial period of this study lasts for 2 months (8 weeks), during which each participant will have 3 visits (at month 0, month 1, and month 2).