Ultimate Flora® Probiotic Plus Immune Support is formulated to not only support good digestive health, but it contains the clinically studied probiotic Bifidobacterium bifidum R0071 which showed a reduction in the incidence of cold-like symptoms in stressed adults. It also includes four other beneficial strains to provide 30 billion active cultures in a convenient one-a-day dose, so there is no need to take another probiotic supplement.