Maitake is a supplement consisting of a pure and high strength (8:1) extract of the medicinal fungus Grifola frondosa. The extraction method is validated, guaranteeing 40% in polysaccharides. The mushrooms used have been cultivated in sustainable and controlled greenhouses, free of heavy metals, herbicides and pesticides in order to guarantee the strength and purity of the extract. Each plant capsule contains 400 mg of Maitake in extract form, suitable for vegetarians, vegans, and people with coeliac disease.