Mechanism of Action
Reishi acts through two families of compounds with distinct modes of action. Polysaccharides (beta-glucans) interact with the intestinal mucosa, a major interface between the body and its environment. This dialogue supports the body's natural defences.
Triterpenes (ganoderic acids) are lipophilic compounds that cross the intestinal barrier intact. They help maintain the balance between free radical production (unstable molecules generated by metabolism) and endogenous neutralisation systems.
A third axis, under active investigation, concerns sleep quality. Preliminary human studies suggest a favourable effect of reishi on deep sleep, possibly through an action on the stress-response axis.
Key Benefits
- Strong
Better-supported natural defences and improved quality of life: this is reishi's best-established benefit. A Cochrane systematic review of five randomised controlled trials documents it in adults supplemented with Ganoderma lucidum.
- Moderate
Longer, better-quality sleep: a controlled trial in 132 participants prone to persistent fatigue measures this improvement after 8 weeks of supplementation with Ganoderma lucidum polysaccharides.
- Moderate
Less oxidative wear in the body: reishi triterpenes help maintain the balance between free-radical production and endogenous neutralisation systems, an effect documented in human supplementation studies.
- Moderate
Greater perceived well-being and less fatigue: a randomised placebo-controlled trial measures these effects in women supplemented with reishi spores for 4 weeks.
- Emerging
Better adaptation to everyday stress: preliminary human studies suggest an adaptogenic action of reishi, helping the body modulate its physiological response to stressful situations.
Dosage & Forms
Several forms of reishi coexist on the market. Dried raw mushroom powder, the most common, contains low concentrations of active compounds and requires high doses (3 to 5 g per day). Simple aqueous extracts concentrate polysaccharides but triterpenes, insoluble in water, remain absent.
Dual extraction (aqueous then ethanolic) is the only method capable of capturing both families. Singular selects a dual extract from the fruiting body, as grain-grown mycelium, though less costly, contains more residual starch and fewer mushroom-specific compounds.
The most robust clinical trials use between 500 mg and 3,000 mg of standardised extract per day.
In the Singular Formula
Inclusion rationale
Mushroom (Ganoderma lucidum) emblematic of the Chinese herbal tradition for over 2,000 years, where it is known as 'lingzhi.' Its unique composition is characterized by a dual richness: triterpenes (ganoderic acids, over 150 oxygenated compounds exclusive to the Ganoderma genus) and polysaccharides (beta-glucans with beta-1,3/1,6 structure). With over 4,000 referenced scientific publications, reishi is one of the most documented functional mushrooms in the world. Ganoderic acids constitute a molecular diversity without equivalent in the fungal kingdom. Traditionally associated with calm and serenity, reishi is described as an adaptogen, a substance that helps the body modulate its stress response. In the formula, it forms a complementary duo with maitake (also present): reishi primarily contributes its triterpenes, while maitake enriches the spectrum with its D-fraction beta-glucans. The dual standardized extract (water and ethanol) allows for the extraction of both water-soluble polysaccharides and lipid-soluble triterpenes, thus preserving the mushroom's full richness.
Selected form
Dual extract from the fruiting body of reishi (Ganoderma lucidum), a functional mushroom called 'lingzhi' in traditional Chinese medicine for over 2,000 years. Dual extraction combines aqueous and ethanolic processes. Aqueous extraction concentrates polysaccharides (beta-glucans), soluble fibres with a branched structure. Ethanolic extraction concentrates triterpenes (ganoderic acids), lipophilic compounds specific to reishi. The 30:1 to 36:1 extraction ratio means 30 to 36 kg of fruiting body are required to yield 1 kg of extract. Most common extracts on the market offer only simple aqueous extraction, without triterpenes. Quality: non-GMO, pesticide-free.
Formula dosage
0 to 1.5 g.
Synergies in the formula
Safety & Precautions
Reishi has over 2,000 years of documented use in the Chinese tradition. Clinical trials report a favourable tolerability profile at standard doses (500 to 3,000 mg of extract per day). The most commonly reported side effects are mild and transient digestive discomfort.
Reishi is not recommended alongside anticoagulants or antiplatelet agents, as certain triterpenic compounds may influence coagulation parameters. It is also not recommended for individuals taking immunosuppressants.
As a precaution, supplementation is not recommended for pregnant or breastfeeding women and children, due to insufficient data in these populations. When in doubt, consult a healthcare professional.
Scientific Studies
| Authors | Year | Type | Journal | |
|---|---|---|---|---|
| Jin X et al. | 2016 | Meta-analysis | Cochrane Database of Systematic Reviews | View on PubMed |
Ganoderma lucidum (Reishi mushroom) for cancer treatment Cochrane systematic review analysing five randomised trials. Results indicate improved quality of life and support for natural defences in participants supplemented with reishi. | ||||
| Tang W et al. | 2005 | Randomised Controlled Trial | Journal of Medicinal Food | View on PubMed |
A randomized, double-blind and placebo-controlled study of a Ganoderma lucidum polysaccharide extract in neurasthenia Randomised double-blind trial of 132 participants with persistent fatigue. The supplemented group shows a significant reduction in fatigue and improvement in sleep quality after 8 weeks. | ||||
| Zhao H et al. | 2012 | Pilot Study | Evidence-Based Complementary and Alternative Medicine | View on PubMed |
Spore Powder of Ganoderma lucidum Improves Cancer-Related Fatigue in Breast Cancer Patients Undergoing Endocrine Therapy: A Pilot Clinical Trial Pilot trial in 48 participants supplemented with reishi spores for 4 weeks. Significant improvement in fatigue and quality of life scores. | ||||
| Wachtel-Galor S et al. | 2004 | Randomised Controlled Trial | British Journal of Nutrition | View on PubMed |
Ganoderma lucidum ("Lingzhi"), a Chinese medicinal mushroom: biomarker responses in a controlled human supplementation study Controlled trial in healthy volunteers supplemented with reishi for 4 weeks. Assessment of antioxidant and lipid markers, with no adverse effects reported. | ||||
| Ahmad MF | 2018 | Systematic Review | Biomedicine and Pharmacotherapy | View on PubMed |
Ganoderma lucidum: Persuasive biologically active constituents and their health endorsement Comprehensive review of reishi bioactive constituents and their documented effects in humans, including antioxidant profile and natural defence support. | ||||
| Cör D et al. | 2018 | Systematic Review | Molecules | View on PubMed |
Antitumour, Antimicrobial, Antioxidant and Antiacetylcholinesterase Effect of Ganoderma lucidum Terpenoids and Polysaccharides: A Review Review of data on the biological activities of reishi triterpenes and polysaccharides, focusing on their documented in vivo antioxidant capacity. | ||||