Saccharomyces boulardii CNCM I-3799 is a coded strain of probiotic yeast, not a bacterium, which matters because yeast naturally tolerates antibiotics that would wipe out bacterial probiotics -- our fact-pack does flag it as antibiotic resistant. It's used in one product here, AnimalBiome's S. boulardii + FOS Powder, at a disclosed 6.6 billion CFU per unit. No published studies turned up for this specific coded strain, and no dose beyond that label figure has been established.
PubMed and PMC, dogs only. Other species are listed separately below and don't count toward the badge.
We don't have a confirmed CFU-per-kg dose number for Saccharomyces boulardii CNCM I-3799 from the canine trials yet -- so this calculator is intentionally disabled rather than guessing.
Being a yeast, it isn't affected by antibiotics the way bacterial probiotic strains can be, which is noted as a trait of this organism in our fact-pack.
It lists 6.6 billion CFU per unit for this strain.
None turned up in our research. No studies are on record for this specific strain code.