Reishi

At a Glance

Common name

Reishi

Scientific name

Ganoderma lucidum

Family

Ganodermataceae

Region

East Asia

Plant part

Fruiting body, Spores

Caffeine

Caffeine Free

Evidence

Limited

Safety review

Safety information on file

Botanical Description

A bracket (shelf) fungus growing on hardwood trees, with a broad kidney-shaped cap bearing a glossy reddish-brown lacquered surface with concentric growth rings, a short lateral stem, and a pale underside of tiny pores.

Also known as: Lingzhi, Mushroom of Immortality, Reishi

Historical Background

Reishi (Lingzhi, 'spirit plant') has been revered in China and Japan for over two thousand years as a tonic for longevity, vitality, and calm. The 'mushroom of immortality' in Daoist tradition, its tough, woody fruiting body is simmered long into a bitter decoction rather than steeped briefly.

Earliest recorded uses: Recorded in the Shennong Ben Cao Jing (~2000 years ago) as a premier tonic; called the 'mushroom of immortality.'

Traditional Uses

These uses document historical traditions and do not imply proven effectiveness.

Flavor & Aroma

Aroma: Bitter, earthy, woody, umami

Tea Preparation

Modern Evidence

Reishi has a long tradition as a calming, immune, and longevity tonic. Small trials and preclinical work suggest modest effects on fatigue, immune markers, and inflammation, but evidence is limited and it is not a treatment for cancer, infection, hypertension, or any disease.

Evidence levels describe the state of research for the traditional use discussed here, not a recommendation. Historical use does not imply effectiveness.