“…While established probiotic strains from the bacterial Lactobacillaceae family and Bifidobacterium genus and fungal strains from the Saccharomyces genus may require protective microencapsulation to survive transit through the GI tract [ 16 , 17 , 18 ], spore-forming Bacillaceae species are generally more resistant to the harsh microenvironments of the GI tract, including acidic gastric pH, intestinal hypoxia, bile salts, and dense colonization by resident microbes [ 19 ]. Commercial probiotic strains of Bacillus subtilis and Heyndrickxia coagulans (formerly Bacillus coagulans ) have been clinically shown to support overall GI tract health and nutrient absorption in healthy adults [ 20 , 21 , 22 , 23 ] and reduce GI symptoms in individuals with mild digestive discomfort [ 20 , 21 , 24 , 25 , 26 , 27 , 28 , 29 , 30 ], dyspepsia [ 31 , 32 ], or inflammatory bowel syndrome [ 33 , 34 , 35 , 36 , 37 ]. Additionally, Alkalihalobacillus clausii (formerly Bacillus clausii ) strains have been demonstrated to modulate immunity in several clinical trials [ 38 , 39 , 40 ].…”