How many studies support Probiotics?

Probiotics have some of the more consistently positive supplement evidence for a specific, common problem: multiple meta-analyses, including a landmark JAMA meta-analysis and two Cochrane reviews (one in children, one for C. That's backed by 10 published studies in Vitaebase's database, including 10 meta-analyses, the most recent from 2025 -- a fairly substantial body of research for a single topic.