tl;dr: A microbiologist grew bacteria from Bigelow's probiotic tea and confirmed via PCR that BC30 (Bacillus coagulans) survives boiling water because it's a heat-resistant spore-forming organism. However, a properly steeped cup yields only ~30,000 CFUs—0.003% of the 1 billion CFU dose used in clinical trials—raising doubts about whether such probiotic products deliver meaningful benefits, especially given conflicting evidence about GI tract survival and undefined targets for a "healthy" microbiome.