Reishi (Ganoderma lucidum) is a polypore mushroom that has occupied a central position in Traditional Chinese Medicine for over two thousand years, where it is known as Lingzhi — the "mushroom of immortality" or "divine mushroom of longevity." It is one of the oldest and most extensively documented medicinal fungi in human history, referenced in the oldest Chinese pharmacopoeia (Shen Nong Ben Cao Jing, circa 200 CE) as a superior herb that could be taken indefinitely without toxicity. Unlike most substances covered on this wiki, Reishi is not psychoactive in the conventional sense — it does not produce an altered state of consciousness, euphoria, or perceptual changes. Its effects are subtle, cumulative, and primarily immunological and adaptogenic. The mushroom contains over 400 bioactive compounds, with the two most pharmacologically significant classes being beta-glucan polysaccharides (which modulate the immune system through activation of innate and adaptive immune pathways) and triterpenes, particularly ganoderic acids (which exhibit anti-inflammatory, hepatoprotective, anti-tumor, and mild sedative properties). Modern clinical interest in Reishi centers on immune modulation in cancer patients, anxiety and sleep quality improvement, and hepatoprotection. While the traditional claims of immortality are obviously hyperbolic, the clinical evidence for Reishi's immune-modulating, sleep-promoting, and stress-reducing effects is real, if still evolving. It is one of the few traditional medicines where the mechanistic pharmacology largely supports the folk uses — the ancients were not wrong that this mushroom does something meaningful to the body, even if they overstated exactly what.
What the Community Wants You to Know
'All Reishi supplements are the same' — this is the most damaging misconception in the medicinal mushroom space. Products range from pure starch (mycelium on grain with less than 5% beta-glucans) to potent dual extracts (30%+ beta-glucans plus 2%+ triterpenes). Independent testing has shown order-of-magnitude differences in bioactive compound content between brands. If you tried Reishi and felt nothing, the product may have been the problem, not the mushroom.
Reishi has anticoagulant properties and should be discontinued at least 2 weeks before any surgical procedure. Do not combine with blood-thinning medications (warfarin, heparin, aspirin, clopidogrel) without consulting your physician. Additionally, because Reishi stimulates the immune system, it is contraindicated for organ transplant patients on immunosuppressants — the immune activation could trigger rejection.
The traditional recommendation to take Reishi as a decocted tea (simmered for 30+ minutes) rather than simply swallowing raw powder is pharmacologically sound. The prolonged heat exposure breaks down the tough chitin cell walls of the mushroom, making the polysaccharides and triterpenes more bioavailable. If you are using raw, unextracted Reishi powder, most of the bioactive compounds pass through you unabsorbed. Extraction matters.
Safety at a Glance
- Quality and Sourcing — The Most Important Factor
- Mycelium grown on grain substrate rather than actual fruiting body — these products are mostly starch with minimal bi...
- Toxicity: General Safety Profile Reishi has a remarkably favorable safety profile based on over two millennia of traditional us...
- Start with a low dose and wait for onset before redosing
If someone is in crisis, call 911 or Poison Control: 1-800-222-1222
Dosage
Oral
Duration
Oral
Total: 6 hrs – 12 hrsHow It Feels
The Reishi Experience
Let us be clear about what Reishi is and is not. It is not a drug in the way that most substances on this wiki are drugs. There is no "Reishi trip report" in any meaningful sense, no come-up, no peak, no comedown. The experience of Reishi is more like the experience of eating well or exercising regularly — the effects accumulate below the threshold of conscious awareness and then, after a few weeks, you realize something has shifted.
The First Week
You start taking Reishi — a capsule with breakfast, a tincture in your morning coffee, a bitter tea before bed. The first day, nothing. The second day, nothing. The third day, maybe a slightly easier time falling asleep, but you cannot be sure it is not placebo. Your stool might be a bit looser than usual. You feel a faint sense of calm about 90 minutes after taking it, but it is so subtle that you genuinely cannot distinguish it from a good mood.
The bitterness, if you are taking it in tea or tincture form, is worth mentioning. Reishi tastes like a forest floor steeped in earth and bark — deeply bitter, woody, and medicinal. Some people find it grounding and enjoyable in the way that black coffee or dark chocolate are enjoyable. Others find it actively unpleasant and switch to capsules immediately. The bitterness is actually a quality indicator — it correlates with triterpene content.
Weeks Two Through Four
This is where the pattern emerges, if it is going to emerge. The most common first signal is sleep. You start noticing that you are falling asleep faster. The racing thoughts that usually accompany the transition from wakefulness to sleep have quieted. You are not knocked out — there is no sedative heaviness — but the slide into sleep is smoother, less turbulent. You wake up less during the night. Morning arrives and you feel more genuinely rested, not groggy.
The anxiety piece develops in parallel. It is not anxiolysis in the pharmaceutical sense — you will not feel the dramatic relief of a benzodiazepine or even the noticeable calm of L-theanine. It is more that your stress response becomes less hair-trigger. Situations that would have spiked your cortisol and set your heart racing now produce a smaller response. You are still you, still reactive to genuine threats and stressors, but the volume knob on the background anxiety has been turned down a notch.
Some people notice they catch fewer colds. Some notice that their seasonal allergies are less severe. Some notice that the chronic low-grade aches in their joints or back have diminished. These effects are real but individually ambiguous — any one of them could be explained by other factors. It is the pattern of multiple small improvements happening simultaneously that becomes convincing.
The Long-Term User Perspective
People who have been taking Reishi daily for months or years tend to describe the benefit not in terms of what Reishi adds but in terms of what they notice when they stop. A two-week break might bring slightly worse sleep, a return of seasonal allergy symptoms, or a sense of being more reactive to daily stressors. These are not withdrawal symptoms — there is no physical dependence — but rather the absence of a subtle ongoing benefit that had become part of the baseline.
The most satisfied long-term Reishi users tend to be people who: had mildly disrupted sleep that was not severe enough for pharmaceutical intervention; experienced chronic low-grade anxiety or stress reactivity; wanted immune support during high-exposure periods; or had mild inflammatory conditions. People who expected dramatic effects — a noticeable "high," immediate relief from severe insomnia, or a transformative cognitive shift — tend to be disappointed. Reishi rewards patience and realistic expectations.
What the Community Says
The Reddit and supplement communities are largely aligned on Reishi: it is one of the most consistently positive medicinal mushrooms, but expectations need to be calibrated. The community consensus is that Reishi is best taken in the evening (for its sleep-promoting properties), that quality varies enormously between products, and that at least 3-4 weeks of consistent use is needed to evaluate whether it is working. The most common criticism is not that Reishi does not work, but that it is expensive for effects that are subtle and slow to develop.
Subjective Effects
The effects listed below are based on the Subjective Effect Index (SEI), an open research literature based on anecdotal reports and personal analyses. They should be viewed with a healthy degree of skepticism. These effects will not necessarily occur in a predictable or reliable manner, although higher doses are more liable to induce the full spectrum of effects.
Physical Effects
Physical(4)
- Dizziness— A sensation of spinning, swaying, or lightheadedness that impairs balance and spatial orientation, o...
- Muscle relaxation— The experience of muscles throughout the body losing their rigidity and tension, becoming noticeably...
- Nausea— An uncomfortable sensation of queasiness and stomach discomfort that may or may not lead to vomiting...
- Sedation— A state of deep physical and mental calming that manifests as a progressive desire to remain still, ...
Cognitive & Perceptual Effects
Cognitive(3)
- Anxiety suppression— A partial to complete suppression of anxiety and general unease, producing a calm, relaxed mental st...
- Dream potentiation— Enhanced dream vividness, complexity, and recall, often occurring as REM rebound after discontinuing...
- Sleepiness— A progressive onset of drowsiness, heaviness, and the desire to sleep that pulls the individual towa...
Community Insights
Common Misconceptions(1)
'All Reishi supplements are the same' — this is the most damaging misconception in the medicinal mushroom space. Products range from pure starch (mycelium on grain with less than 5% beta-glucans) to potent dual extracts (30%+ beta-glucans plus 2%+ triterpenes). Independent testing has shown order-of-magnitude differences in bioactive compound content between brands. If you tried Reishi and felt nothing, the product may have been the problem, not the mushroom.
Based on 1 community posts · 0 combined upvotes
Harm Reduction(1)
Reishi has anticoagulant properties and should be discontinued at least 2 weeks before any surgical procedure. Do not combine with blood-thinning medications (warfarin, heparin, aspirin, clopidogrel) without consulting your physician. Additionally, because Reishi stimulates the immune system, it is contraindicated for organ transplant patients on immunosuppressants — the immune activation could trigger rejection.
Based on 1 community posts · 0 combined upvotes
Community Wisdom(1)
The traditional recommendation to take Reishi as a decocted tea (simmered for 30+ minutes) rather than simply swallowing raw powder is pharmacologically sound. The prolonged heat exposure breaks down the tough chitin cell walls of the mushroom, making the polysaccharides and triterpenes more bioavailable. If you are using raw, unextracted Reishi powder, most of the bioactive compounds pass through you unabsorbed. Extraction matters.
Based on 1 community posts · 0 combined upvotes
Dosage Guidance(1)
Clinical trials showing positive results for sleep and immune function have used the Ganopoly standardized extract at 1,800 mg/day (600mg three times daily) for 4-12 weeks. This is a reasonable evidence-based target dose. Dried mushroom powder requires much higher doses (3-9 g/day) because it is less concentrated. Tinctures vary too widely in concentration to give universal dosing guidance — follow the specific product's recommended dose and verify the extract ratio.
Based on 1 community posts · 0 combined upvotes
Set & Setting(1)
Reishi works best as part of an evening wind-down routine rather than taken randomly during the day. The ritual matters: brewing Reishi tea, taking a tincture in warm water, or simply taking capsules at a consistent evening time all serve as a signal to your nervous system that the day is ending and it is time to shift toward rest. Consistency of timing may be as important as the pharmacology for the sleep benefits.
Based on 1 community posts · 0 combined upvotes
Pharmacology
Mechanism of Action
Reishi's pharmacology is fundamentally different from most substances because it does not target a single receptor or neurotransmitter system. Instead, it delivers a complex cocktail of bioactive compounds — over 400 identified to date — that interact with multiple physiological systems simultaneously. The two primary pharmacologically active compound classes are polysaccharides (particularly beta-glucans) and triterpenes (particularly ganoderic acids).
Beta-Glucan Polysaccharides — Immune Modulation
Reishi's polysaccharides are predominantly alpha-1,3, beta-1,3, and beta-1,6-D-glucans with glucose as the major sugar component. These compounds are the primary drivers of Reishi's immune-modulating effects. They work through several overlapping mechanisms:
- Pattern recognition receptor activation — beta-glucans are recognized by Dectin-1, complement receptor 3 (CR3), and Toll-like receptor 4 (TLR-4) on innate immune cells. This activates macrophages, dendritic cells, and natural killer (NK) cells
- Cytokine modulation — Reishi polysaccharides stimulate the release of TNF-alpha, interleukins (IL-1, IL-2, IL-3, IL-6), and interferons, enhancing both innate and adaptive immune responses
- NK cell activation — polysaccharides increase NK cell cytotoxicity through activation of specific signaling pathways, resulting in enhanced release of cytotoxic granules (perforin and granzymes)
- T and B lymphocyte activation — stimulates proliferation and differentiation of both cytotoxic T cells and antibody-producing B lymphocytes
- NF-kB and MAP kinase pathway activation — these transcription factor cascades mediate the downstream immune-stimulating effects
Importantly, Reishi is an immunomodulator rather than a simple immunostimulant — there is evidence that it can both upregulate suppressed immune function and dampen excessive inflammatory responses, depending on the immunological context. This bidirectional activity is what qualifies it as an adaptogenic substance.
Ganoderic Acids and Triterpenes — Anti-Inflammatory and Sedative
Reishi contains over 130 identified triterpenes, with ganoderic acids A, B, C, D, and F being the most studied. These compounds are responsible for Reishi's bitter taste and many of its non-immune pharmacological effects:
- Anti-inflammatory activity — ganoderic acids inhibit histamine release from mast cells, suppress pro-inflammatory cytokine production, and inhibit cyclooxygenase (COX) and lipoxygenase (LOX) pathways
- Hepatoprotective effects — ganoderic acids protect liver cells against oxidative damage, reduce liver enzyme elevation, and promote hepatocyte regeneration in animal models of chemical liver injury
- Anti-tumor mechanisms — triterpenes inhibit tumor invasion by reducing matrix metalloproteinase (MMP) expression, limiting cancer cell attachment to blood vessel walls, and inducing apoptosis through caspase activation. In ovarian cancer cell lines, Reishi extract triggered cell cycle arrest, activated apoptosis mechanisms, and inhibited growth-promoting proteins
- Mild sedative and anxiolytic activity — ganoderic acids modulate GABAergic and serotonergic signaling, contributing to the calming and sleep-promoting effects that traditional medicine has utilized for centuries
- 5-alpha-reductase inhibition — some ganoderic acids weakly inhibit 5-alpha-reductase, the enzyme that converts testosterone to DHT, which may have implications for prostate health
Other Bioactive Compounds
- Ganoderan — a specific polysaccharide with hypoglycemic activity
- Adenosine and adenosine analogs — contribute to the sedative and cardiovascular-relaxing effects
- Ergosterol derivatives — precursors to vitamin D2 and contributors to anti-inflammatory activity
- Peptidoglycans — additional immune-modulating compounds
- Phenolic compounds — provide antioxidant capacity
Pharmacokinetics
Reishi's pharmacokinetics are poorly characterized compared to pharmaceutical drugs because the active compounds are a complex mixture rather than a single molecule. What is known:
- Oral bioavailability of beta-glucans: variable and generally low; extraction method (hot water vs. dual extraction) significantly affects the bioavailability of polysaccharides versus triterpenes
- Hot water extraction: preferentially extracts polysaccharides (immune-modulating compounds)
- Alcohol/ethanol extraction: preferentially extracts triterpenes (anti-inflammatory, hepatoprotective compounds)
- Dual extraction (water + alcohol): captures both compound classes and is considered the gold standard for full-spectrum preparations
- Onset of effects: immune-modulating effects require sustained daily dosing over 1-4 weeks to become measurable; acute sedative effects from high-triterpene preparations may be noticeable within 1-2 hours
- There is no meaningful half-life to report for a complex botanical; effects are cumulative and depend on compound accumulation and immune system remodeling over time
Interactions
No documented interactions.
History
Ancient Origins
Reishi has one of the longest documented histories of medicinal use of any natural product. The earliest known references appear in the Shen Nong Ben Cao Jing (Divine Farmer's Classic of Materia Medica), a Chinese pharmacopoeia compiled around 200 CE but drawing on oral traditions dating back much further. In this foundational text, Reishi (Lingzhi) was classified as a**"superior" herb** — the highest category, reserved for substances that could be taken indefinitely to promote longevity without adverse effects.
The name Lingzhi translates roughly as "divine mushroom" or "spirit plant," and the fungus held an extraordinary cultural status in Chinese civilization. It was associated with:
- Immortality and longevity — Reishi appears repeatedly in Taoist art and literature as a symbol of eternal life. Taoist monks and alchemists actively sought wild Reishi specimens as ingredients in elixirs of immortality
- Imperial medicine — Reishi was reserved for emperors and nobility during much of Chinese history, partly due to its genuine rarity in the wild and partly due to its elevated cultural status
- The "herb of spiritual potency" — traditional practitioners prescribed it for calming the mind (shen), promoting restful sleep, and supporting what they called the "three treasures" of qi, jing, and shen (life force, essence, and spirit)
Japanese and Korean Traditions
In Japan, Reishi is known as Mannentake ("10,000-year mushroom") and has been used in Kampo medicine since at least the Nara period (710-794 CE). Korean traditional medicine similarly incorporated Reishi (Yeongji) for tonifying qi and calming the spirit.
The Cultivation Breakthrough
Wild Reishi is rare — it grows on hardwood trees (particularly oaks and maples) and only a fraction of trees in a given forest will host it. For most of history, its scarcity limited access to the wealthy. The modern era of Reishi began in 1972, when Japanese researcherShigeaki Mori successfully developed a reliable method for cultivating Ganoderma lucidum on hardwood logs and sawdust substrates. This breakthrough made Reishi available at scale for the first time and launched the modern Reishi supplement industry.
Modern Scientific Interest
Systematic pharmacological research on Reishi began in earnest in the 1970s-1980s in China and Japan. Key milestones include:
- 1970s-1980s: Isolation and characterization of beta-glucan polysaccharides and their immune-stimulating properties
- 1982: First identification of ganoderic acids (triterpenes) by Kubota et al.
- 1990s-2000s: Clinical trials on cancer-related immune support, quality of life in cancer patients, and fatigue
- 2005-2012: Randomized controlled trials on sleep quality in neurasthenic patients (Ganopoly studies) and breast cancer-related fatigue
- 2010s-present: Growing interest in Reishi as an adaptogen and nootropic in Western supplement culture, driven by the broader medicinal mushroom movement alongside Lion's Mane, Chaga, Cordyceps, and Turkey Tail
Today, the global Reishi market is valued at several billion dollars annually, with China, Japan, South Korea, and the United States being the largest markets.
Harm Reduction
Quality and Sourcing — The Most Important Factor
The single most critical harm reduction issue with Reishi is not dosage or side effects — it is product quality. The mushroom supplement market is notoriously poorly regulated, and testing has revealed that many products labeled as Reishi contain:
- Mycelium grown on grain substrate rather than actual fruiting body — these products are mostly starch with minimal bioactive compounds
- Incorrect species — some products contain other Ganoderma species or unrelated fungi
- Heavy metal contamination — mushrooms are bioaccumulators and can concentrate lead, cadmium, mercury, and arsenic from their growing substrate
- Pesticide residues — particularly in products sourced from regions with lax agricultural regulations
To maximize the chance of getting an effective product:
- Look for products made from fruiting body (not mycelium on grain)
- Choose dual extraction (water + alcohol) for full-spectrum compounds
- Verify that the product lists beta-glucan content (aim for 20%+ by weight)
- Look for third-party testing (Certificate of Analysis) from labs like Eurofins, NSF, or USP
- Reputable brands in the space include those that publish full CoA results and specify extraction methods
Dosage Guidelines
- Dried Reishi powder: 1.5-9 g/day (traditional dosing)
- Hot water extract: 1-1.5 g/day (concentrated; equivalent to several grams of dried mushroom)
- Dual extract (tincture): 2-4 mL/day, typically standardized to polysaccharide and triterpene content
- Reishi spore powder: 1-3 g/day (spore oil capsules are more concentrated)
- Ganopoly (standardized polysaccharide extract): 1,800 mg/day (600 mg three times daily) — this is the dosage used in several clinical trials
Start with the lower end of any dosage range and increase gradually over 1-2 weeks to assess tolerance.
Who Should Avoid Reishi
- Organ transplant recipients or anyone on immunosuppressive therapy
- People with bleeding disorders or on anticoagulant medications (without physician approval)
- Pre-surgical patients — discontinue at least 2 weeks before surgery
- Pregnant or breastfeeding women — insufficient safety data
- People with mushroom allergies — cross-reactivity is possible
- Cancer patients on active chemotherapy — Reishi's high antioxidant capacity may theoretically interfere with therapies that rely on free radical mechanisms. Always discuss with your oncologist
Cycling
Although Reishi is traditionally considered safe for continuous long-term use, the hepatotoxicity case reports suggest that periodic cycling (e.g., 8 weeks on, 2 weeks off) may be prudent, particularly at higher doses. This also allows for assessment of whether ongoing supplementation is still providing benefit.
Toxicity & Safety
General Safety Profile
Reishi has a remarkably favorable safety profile based on over two millennia of traditional use and several decades of modern clinical research. In clinical trials lasting up to 16 weeks at standard doses (1.5-5.4 g/day of extract), adverse effects have been mild and infrequent. However, Reishi is not without risks, and several serious adverse events have been documented.
Common Side Effects
The most commonly reported adverse effects at standard doses include:
- Gastrointestinal discomfort — nausea, bloating, loose stools, and diarrhea, particularly when beginning supplementation or at higher doses. These effects often resolve with continued use or dose reduction
- Dizziness — mild and transient, more common during the first week of use
- Dry mouth — reported in a small percentage of clinical trial participants
- Skin rash or itching — occasional allergic reactions, particularly in individuals with mushroom allergies
Hepatotoxicity
This is the most clinically significant safety concern. Although Reishi is traditionally used to protect the liver, case reports of hepatotoxicity exist, including one fatal case documented by Memorial Sloan Kettering Cancer Center. The hepatotoxic potential appears to be associated with:
- High-dose or concentrated extract preparations (particularly powdered Reishi)
- Prolonged continuous use without breaks
- Pre-existing liver conditions
- Individual susceptibility (idiosyncratic reaction)
Monitoring liver enzymes (ALT, AST) is advisable for anyone using Reishi daily for extended periods, particularly at doses above 3 g/day.
Anticoagulant Effects
Reishi has mild anticoagulant and antiplatelet properties. While this contributes to its cardiovascular benefits, it creates a bleeding risk when combined with anticoagulant or antiplatelet medications (warfarin, heparin, aspirin, clopidogrel) or before surgical procedures. Discontinue Reishi at least 2 weeks before planned surgery.
Tumor Marker Interference
Reishi spore powder has been documented to elevate CA72-4 tumor marker levels, which can interfere with cancer monitoring and lead to false-positive results. This is important for cancer patients undergoing treatment monitoring — inform your oncologist if you are taking Reishi.
Immunosuppressant Interaction
Because Reishi stimulates immune function, it may theoretically antagonize immunosuppressive medications used in organ transplant patients, autoimmune disease management, and some cancer treatments. This is a contraindication rather than a mild concern — do not combine Reishi with immunosuppressants without explicit oncologist or transplant physician approval.
Cytochrome P450 Interactions
In vitro studies show Reishi extract inhibits CYP2E1, CYP1A2, and CYP3A enzymes. While clinical significance is uncertain, this raises the possibility of drug interactions with medications metabolized by these pathways.
Addiction Potential
No addiction potential. Reishi does not produce euphoria, does not activate reward pathways, has no reinforcing properties, and produces no withdrawal syndrome upon discontinuation. It is not scheduled as a controlled substance in any jurisdiction worldwide. Tolerance to its effects has not been documented, and some evidence suggests that immune-modulating effects may actually increase with sustained use as cumulative immune system remodeling occurs.
Tolerance
| Full | Not documented; effects may increase with sustained use |
| Half | N/A |
| Zero | N/A |
Cross-tolerances
Legal Status
Reishi (Ganoderma lucidum) is legal and unregulated in virtually all jurisdictions worldwide. It is classified as a dietary supplement in the United States, the European Union, the United Kingdom, Canada, Australia, and Japan. It is not a controlled substance anywhere. In China, Japan, and South Korea, Reishi has official recognition in national pharmacopoeias as an approved traditional medicine. The European Food Safety Authority (EFSA) has not approved specific health claims for Reishi, though it remains legally sold as a food supplement. In the United States, Reishi supplements are regulated under DSHEA (Dietary Supplement Health and Education Act of 1994), meaning manufacturers cannot make disease treatment claims but can make structure/function claims.
Experience Reports (6)
Tips (6)
Avoid products made from 'mycelium on grain' — these are mostly starch filler with minimal bioactive compounds. Independent testing has shown some mycelium-on-grain products contain less than 5% beta-glucans compared to 25-40% in quality fruiting body extracts. Check the label: it should specify 'fruiting body' and list beta-glucan content.
Always choose a dual extract (water + alcohol) over a water-only or raw powder product. Hot water extraction pulls out the immune-modulating polysaccharides, but alcohol extraction is needed to get the triterpenes (ganoderic acids) responsible for anti-inflammatory, liver-protective, and calming effects. A water-only extract gives you half the mushroom's pharmacology.
Do not evaluate Reishi after less than 4 weeks of consistent daily use. The immune-modulating and sleep-promoting effects are cumulative, not acute. Most clinical trials showing positive results used treatment periods of 4-16 weeks. Two-week trials are the single most common reason people incorrectly conclude that Reishi does not work.
Take Reishi in the evening, ideally 1-2 hours before bed. The triterpene content promotes relaxation and supports sleep onset. Taking it in the morning is not harmful, but you are missing the optimal timing for its most consistently reported benefit — improved sleep quality. If you are stacking with Lion's Mane, the standard protocol is Lion's Mane in the morning and Reishi in the evening.
If you are taking Reishi daily at doses above 2g of extract, get your liver enzymes (ALT, AST) checked after 3 months and then annually. Hepatotoxicity is rare but documented, including one fatal case. This is especially important if you are using concentrated extracts or taking higher-than-standard doses. A simple blood panel can catch problems early.
When buying Reishi, taste test it. Good Reishi extract should be noticeably bitter — the bitterness comes from triterpenes (ganoderic acids), and a bitter product indicates meaningful triterpene content. If your Reishi powder or tincture has no bitter taste, it likely contains minimal active triterpenes and you are mostly paying for polysaccharides and filler.
See Also
References (5)
- Reishi Mushroom — Memorial Sloan Kettering Cancer Center
Clinical monograph from a leading cancer center covering Reishi's mechanism of action, clinical research, drug interactions (anticoagulants, immunosuppressants, CYP450 substrates), and documented adverse effects including rare hepatotoxicity.
encyclopedia - Ganoderma lucidum — Wikipedia
Overview of taxonomy, traditional use in Chinese and Japanese medicine, active compounds, cultivation history, and modern research summary.
encyclopedia - Ganoderma lucidum (Reishi mushroom) for cancer treatment — Cochrane Review — Jin X, Ruiz Beguerie J, Sze DM, Chan GC Cochrane Database of Systematic Reviews (2016)
Systematic review of 5 randomized controlled trials examining Reishi supplementation alongside conventional cancer treatment. Found that Reishi enhanced tumor response and host immunity when used alongside chemo/radiotherapy, though evidence quality was limited.
paper - Spore powder of Ganoderma lucidum improves cancer-related fatigue in breast cancer patients — a randomized clinical trial — Zhao H, Zhang Q, Zhao L, Huang X, Wang J, Kang X Evidence-Based Complementary and Alternative Medicine (2012)
Randomized clinical trial of 48 breast cancer patients showing Reishi spore powder (1000mg TID for 4 weeks) significantly improved physical well-being and fatigue scores, with reduced TNF-alpha and IL-6 levels and no serious adverse effects.
paper - Ganoderma lucidum — a comprehensive review on its traditional use, pharmacology, and clinical studies — Ahmad MF Phytotherapy Research (2018)
Review of approximately 400 bioactive compounds in Reishi including triterpenes, polysaccharides, and their mechanisms of action. Covers immune modulation, anti-tumor, hepatoprotective, neuroprotective, and anti-inflammatory properties with clinical trial dosage data.
paper