In the far east, and more precisely in Japan and China, since antiquity was used as a beneficial fungus: Reishi or Ganoderma lucidum. The shiny and lacquered look is a mushroom growing in wetlands, and even in our forests, especially on chestnut and oak logs: millennia or so the Japanese have renamed it "the mushroom of immortality", while in the texts Chinese were cited as "the plan of the spirit", attributing them the ability to increase vital energy and longevity.
For this reason, many Chinese emperors took it in the form of decoction and was often preferred to the popular Ginseng by numerous oriental herbs. Today, scientific research recognizes Reishi's ability to support the natural defenses of the organism.