ImmunotiX 500™ delivers 500 mg of Wellmune^® whole glucan particle per capsule, providing beta 1,3/1,6 glucan—that's double the dose of ImmunotiX 250™. Beta 1,3/1,6 glucan is a unique complex carbohydrate purified from Saccharomyces cerevisiae (baker’s yeast). It is natural, non-genetically modified (non-GMO), hypoallergenic, patented, and generally recognized as safe (GRAS). Taken orally, ImmunotiX 500 primes and mobilizes the cells that support the body's first-line immune response.