Grifron Maitake D-Fraction Standard is an alcohol-free liquid supplement that supports a healthy immune response. This formula extract is standardized to deliver 30% active proteoglucan 18 mg. 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 Maitake D-Fraction Standard 2 oz. bottle delivers 1,500 mg of PD-Fraction, which is standardized to deliver more than 450 mg (30%) of the active proteoglucan.This product contains no sugar, yeast, mold, artificial colors, dairy foods, preservatives, and chemical pesticides or fertilizers.