Saccharomyces cerevisiae beta-glucan

Tier 2 — promising · Immunity · Respiratory infections · Natural killer cells

Whole inactivated baker's yeast provides 1,3/1,6 beta-glucans as a natural immune primer. Multiple trials show whole yeast beta-glucans reduce the incidence of colds and upper respiratory infections in active adults by 20 to 30 percent. Also supports natural killer cell activity. Different from probiotic Saccharomyces boulardii — this is inactivated for immune stimulation, not gut colonisation.

Dose: 250–500 mg/day inactivated whole yeast or equivalent 1,3/1,6 beta-glucan; different from S. boulardii