However, red Reishi has been proven to be the most effective in improving one’s overall health by enhancing the immune system, many bodily functions, and vital organs. Black Reishi (Ganoderma sinensis), is fairly common and can be found in most Chinese herbal shops. This species of Ganoderma tends to be unevenly shaped and can measure up to ten inches in diameter, although most mature specimens are about six inches in diameter. The majority of Reishi products that claim to be using "wild". Reishi generally use black Reishi. While it still possesses some value as a moderate herbal tonic, black Reishi is considered to be inferior to red Reishi because of its lower polysaccharide content.