Reishi Mushroom Supreme, 650 mg, 100 Tablets - Planetary HerbalsPlanetary Herbals Reishi Mushroom Supreme, 650 mg, 100 Tablets, is a dietary supplement designed to enhance immune resistance. Reishi mushroom, a highly prized botanical in Chinese herbalism, has been used for over 2,500 years as a general tonic to support health and longevity. Modern studies have shown that reishi supports both general and specific immune resistance. This product combines a concentrated extract of the mature reishi fruiting body with