Herb Pharm Reishi Mushroom Liquid Extract is expertly extracted to build the immune system. Prepared from Ganoderma lucidum mushrooms, this rapidly absorbed liquid extract is gluten-free and non-GMO. The herb potency is assured through High Performance Thin Layer Chromatography (HPTLC) analysis. The product is packaged in a 1 fluid ounce (30 ml) bottle and is suitable for adults.