The reishi mushroom, also known as Ganoderma lucidum or lingzhi. There are several molecules, including triterpenoids, polysaccharides and peptidoglycans, that may be responsible for its health effects, especially supporting the immune system and brain health.
These include reduced fatigue and depression, as well as improved quality of life. One study examined its effects in 132 people with neurasthenia, a poorly defined condition associated with aches, pains, dizziness, headaches and irritability. The researchers found that fatigue was reduced and well-being was improved after 8 weeks of taking the supplements.