Reishi SAP is a hot water–extract from the reishi mushroom, also known by its scientific name Ganoderma Lucidum, which has been used in Japan for over 2000 years.* This mushroom has been used as an herbal  to help increase energy and resistance to stress.* The reishi mushroom has also been used as a liver tonic, as well as to support immune function.* Reishi has antioxidant properties.*