Mushroom Wisdom Maitake D Fraction Pro is an immune system support formula that features Maitake PD-Fraction®, a registered, standardized form of maitake mushroom extract that includes 30% proteoglucan. Besides supporting the immune system, maitake also supports blood pressure health as well as blood glucose levels already within the normal range. Contains no gluten, wheat, soy, dairy, artificial colors, flavors or preservatives.