The high ratio of immunomodulating compounds from Chaga, added to those of Reishi, Maitake, Shiitake and Sun Mushroom, allows greater activation of host cell receptors, thus improving the overall effectiveness of the formula. Unlike other formulas on the market, Mico-Five contains alpha, beta and D-glucans, ganoderic acid, grifolan, lentinan and ergosterol. Fungi are the only non-animal food that contains vitamin D in the form of the precursor ergosterol, or provitamin D. This substance contributes to calcium and phosphorus absorption and plays an important role in the normal functioning of the immune system.