Sperm Quality

The clinical trial aims to investigate the impact of probiotic strain BL21 on sperm quality among 46 middle-aged male participants. The primary objective is to validate whether probiotic strain BL21 can effectively improve sperm quality among middle-aged male participants. Initially, participants were instructed to consume the recommended amount of probiotic powder for approximately 8 weeks. At baseline, week 4, and week 8 endpoints, semen analysis, hormone level testing, serum cytokine testing were conducted on the participants, and stool samples were collected from them.