MushRex® Blend contains Six Certified-Organic Mushroom Species included in this formula because of their centuries-old and more recent usage in China, Japan & Russia. Lentinula edodes (Shiitake) Grifola frondosa (Maitake) Ganoderma lucidum (Reishi) Agaricus blazei (Himematsutake) Coriolus versicolor (Turkey Tail) and Inonotus obliquus (Chaga) are considered to be the most immuno-active of all mushrooms and have been studied extensively for their immuno-stimulatory properties.Camu Camu (Myrciaria dubia), a berry valued for its high levels of naturally-occurring Vitamin C, has been added to assist in the synergy & bioavailability of our full-spectrum blend.Berry Immune Blend (Elderberry Aronia & Bilberry Extracts) is a proprietary blend of concentrated berry extracts formulated to help support a healthy immune system. One of its key ingredients, Elderberry (Sambucus nigra) is used worldwide, especially during flu & cold seasons.*EpiCor® (dried yeast fermentate complex), a revolutionary new dietary ingredient which significantly helps support immune function has been added to further enhance the naturally-occurring Beta-Glucans found in our MushRex® Blend.AHCC® (Active Hexose Correlated Compound) is a proprietary blend of several hybridized species of mushroom mycelia that is standardized for its low molecular weight (5,000 daltons) alpha-glucan content. AHCC® is extensively used throughout Japan as a dietary supplement to support immune health. Product Review as Follows: From Virginia: "This product contains several sources of mushrooms, which are excellent immune boosters. Mushrooms have the power to shrink tumors. I had a large mole on the right side of my neck, which had changed shape and was very sensitive to touch. I started using this product, together with AHCC and my mole literally disappeared."