Why Your Probiotic Isn’t Working (And Which One Might)

Most probiotics don't work because most people are taking the wrong strain for the wrong problem. Strain code matters more than CFU count, and up to 73 percent of products fail their own label claims when third-party tested. Here's which strains have real evidence for IBS, antibiotic recovery, perimenopause symptoms, and bacterial vaginosis — and how to actually read the bottle.