Ultimate Immune Enhancer. Grifron®-Pro Maitake D-Fraction® Tablet is a combination of whole Maitake mushroom powder and standardized "active proteoglucan" in a easy-to-swallow small tablet from with professional strength. Maitake mushroom (Grifola frondosa) is an edible tasty mushroom prized in Asian countries for centuries. Since the 1980s Maitake mushroom became a subject of scientific studies and researchers found that it supports healthy immune functions healthy blood glucose levels and healthy blood pressure in laboratory animals.*. The active proteoglucan often referred to as D-fraction by scientists is a unique beta-glucan conjugated with protein which has been identified and isolated as a responsible substance for potent immune-activating property of Maitake mushroom.*. Grifron®-Pro Maitake D-Fraction® Tablet contains no alcohol sugar yeast mold gluten dairy products artificial colors preservatives pesticides herbicides or fertilizers.