Maitake (Grifola frondosa) has been prized in traditional Japanese herbology for centuries. Grifron Maitake D Fraction Standard 120ml provides a standardized Proteoglucan complex (D-fraction) with Beta-1,3 and Beta-1,6 glucans in a protein matrix to support immune health. Each 20 drops contain at least 5.5 mg of D-fraction, extracted from organically grown Maitake fruit body in a vegetable glycerine base. Grifron Maitake is the original Maitake mushroom supplement.