30 Capsules | 30 Servings | 250 mg TruImmune™ Boost’s active ingredient is beta 1,3/1,6 glucan, a unique complex carbohydrate purified from Saccharomyces cerevisiae (baker’s yeast). It is natural, not genetically modified (non-GMO), hypoallergenic, patented, and generally recognized as safe (GRAS). Taken orally, TruImmune™ Boost, without ...