Testing the Immunomodulatory Effects of Probiotic Bacillus coagulans SNZ 1969® in Healthy Adults: A Randomized, Double-Blind, Placebo-Controlled Trial

<i>B. coagulans</i> SNZ 1969^® supplementation significantly enhanced NK cell activity and mucosal IgA production in adults, suggesting its potential role in strengthening the innate immune defense mechanisms. These findings support the role of <i>B. coagulans</i> SNZ 1969^® as a safe dietary supplement for augmenting innate cellular immune function and thereby potentially contributing to a reduced trend to infection susceptibility; however, these preliminary findings require more extensive investigation in a larger study population.