Ultra-Reishi is intended to enhance immune function while providing antioxidant support. This supplement is an exceptional combination of green tea and medicinal mushrooms. Ultra Reishi contains an incredibly high concentration of EgCG, found in green tea. A typical dose has the medicinal effect of 46 cups of decaffeinated green tea. Green tea is a well-known antioxidant. This product also contains Red Reishi and Chaga, both known for immune support.