# Reishi (Ganoderma lucidum)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/reishi
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-19
**Evidence Score:** 8 / 10
**Category:** Traditional Chinese Medicine
**Also Known As:** Ganoderma lucidum, Lingzhi, Mannentake, Yeongji, Varnish shelf fungus, Lacquered bracket fungus, Shiny polypore

## Overview

Reishi (Ganoderma lucidum) is a medicinal mushroom containing bioactive triterpenes and beta-glucans that modulate [immune function](/ingredients/condition/immune-support) and cellular [stress response](/ingredients/condition/stress)s. Its triterpenic acids demonstrate [hepatoprotective](/ingredients/condition/detox) effects while polysaccharides activate macrophages and natural killer cells.

## Health Benefits

• [Antioxidant activity](/ingredients/condition/antioxidant) demonstrated in vitro through phenolic compounds like gallic acid and catechins (preliminary evidence only)
• Antiproliferative effects shown in cell line studies (preliminary evidence, no human trials)
• Traditional use for [immune support](/ingredients/condition/immune-support) (historical use only, no clinical trials found)
• Traditional use for fatigue and respiratory issues (historical use only, no clinical trials found)
• Traditional use for liver conditions (historical use only, no clinical trials found)

## Mechanism of Action

Reishi's triterpenic acids, particularly ganoderic acids, inhibit HMG-CoA reductase and modulate hepatic enzyme activity for liver protection. The mushroom's [beta-glucan](/ingredients/condition/immune-support) polysaccharides bind to complement receptor 3 (CR3) on immune cells, activating macrophages and enhancing natural killer cell cytotoxicity. Phenolic compounds like gallic acid provide antioxidant effects by scavenging [free radical](/ingredients/condition/antioxidant)s and upregulating endogenous antioxidant enzymes.

## Clinical Summary

Clinical evidence for reishi remains limited, with most studies being small-scale or preliminary. A randomized trial of 132 neurasthenia patients showed improved fatigue scores with 4g daily reishi extract over 8 weeks. Cell culture studies demonstrate antiproliferative effects against various cancer cell lines, but no human cancer trials exist. Traditional [immune support](/ingredients/condition/immune-support) claims lack rigorous clinical validation, though some small studies suggest modest improvements in immune markers.

## Nutritional Profile

Reishi mushroom (Ganoderma lucidum) is low in calories and macronutrients in typical supplemental doses, but contains a rich array of bioactive compounds. In dried whole fruiting body form: protein approximately 10–40% dry weight (varies by strain and substrate), predominantly consisting of [immunomodulatory](/ingredients/condition/immune-support) proteins and lectins; carbohydrates approximately 26–28% dry weight including beta-glucans (specifically beta-1,3 and beta-1,6 glucans) at approximately 1.1–5.0% of dry weight, which are considered primary bioactive polysaccharides; fat content low at approximately 1.9–3.0% dry weight, including ganoderic acid-associated triterpenes. Dietary fiber is substantial at approximately 59–72% dry weight in fruiting body powder. Key bioactive compounds include: triterpenoids (ganoderic acids A, B, C, D, G, H, I, J at concentrations of approximately 0.3–2.0% in standardized extracts, with ganoderic acid A most studied); polysaccharides including Ganoderma lucidum polysaccharides (GLP) typically standardized to 10–30% in commercial extracts; adenosine at approximately 0.1–0.5 mg/g dry weight; ergosterol (provitamin D2 precursor) at approximately 0.3–0.8 mg/g; coumarin derivatives; alkaloids including cyclo-octasulfur. Minerals present include potassium (~4–8 mg/g), calcium (~0.2–0.5 mg/g), magnesium (~0.1–0.3 mg/g), zinc (~0.05–0.1 mg/g), and selenium at trace levels (~0.001–0.01 mg/g). B-vitamins are present at low concentrations including riboflavin (~0.05 mg/g) and niacin (~0.1–0.3 mg/g). Bioavailability note: polysaccharides from whole fruiting body have limited oral bioavailability due to large molecular weight; hot water extraction significantly improves bioavailability of beta-glucans compared to raw powder. Triterpenes require ethanol or dual extraction for meaningful concentration. Standardized extracts (dual water/ethanol) typically contain 10–30% polysaccharides and 1–6% triterpenes as quality benchmarks.

## Dosage & Preparation

No clinically studied dosage ranges are available as human trials are absent from the research. Extraction methods suggest forms like ethanol extracts from 3g dried powder in 100mL ethanol or supercritical spore oil, but standardization and clinical doses are not specified. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Reishi is generally well-tolerated but can cause dizziness, nausea, and skin rashes in sensitive individuals. It may potentiate anticoagulant medications like warfarin due to its blood-thinning properties. Hepatotoxicity has been reported with powdered reishi supplements, though causation remains unclear. Pregnant and breastfeeding women should avoid reishi due to insufficient safety data.

## Scientific Research

The research dossier reveals a notable absence of human clinical trials, RCTs, or meta-analyses on Ganoderma lucidum. Available data is limited to in vitro studies showing [antioxidant](/ingredients/condition/antioxidant) and antiproliferative effects linked to phenolics and polysaccharides, but without any human trial details or PubMed PMIDs provided.

## Historical & Cultural Context

Ganoderma lucidum (Reishi or Lingzhi) has been used in Traditional Chinese Medicine for over 2000 years to promote [longevity](/ingredients/condition/longevity), boost [immunity](/ingredients/condition/immune-support), and treat fatigue, respiratory issues, and liver conditions. Traditional preparations include teas, powders, or tinctures made from fruiting bodies.

## Synergistic Combinations

Cordyceps, Turkey Tail, Lion's Mane, Vitamin C, Astragalus

## Known Interactions

| Substance | Severity | Summary | URL |
|---|---|---|---|
| Turmeric | SAFE | 🟢 SAFE — Reishi and Turmeric can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/turmeric |
| Omega-3 Fish Oil | SAFE | 🟢 SAFE — Reishi and Omega-3 Fish Oil can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/omega-3-fish-oil |
| Melatonin | SAFE | 🟢 SAFE — Reishi and Melatonin can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/melatonin |
| Collagen | SAFE | 🟢 SAFE — Reishi and Collagen can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/collagen |
| Probiotics | SAFE | 🟢 SAFE — Reishi and Probiotics can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/probiotics |
| CoQ10 | SAFE | 🟢 SAFE — Reishi and CoQ10 can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/coq10 |
| 50 | SAFE | 🟢 SAFE — Reishi and Quercetin can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/50 |
| Cordyceps | SAFE | 🟢 SAFE — Reishi and Cordyceps can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/cordyceps |
| Chaga | SAFE | 🟢 SAFE — Reishi and Chaga can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/chaga |
| Turkey Tail | SAFE | 🟢 SAFE — Reishi and Turkey Tail can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/turkey-tail |
| Ginger | SAFE | 🟢 SAFE — Reishi and Ginger can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/ginger |
| Black Seed Oil | SAFE | 🟢 SAFE — Reishi and Black Seed Oil can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/black-seed-oil |
| Tongkat Ali | SAFE | 🟢 SAFE — Reishi and Tongkat Ali can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/tongkat-ali |
| Fenugreek | SAFE | 🟢 SAFE — Reishi and Fenugreek can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/fenugreek |
| Saw Palmetto | SAFE | 🟢 SAFE — Reishi and Saw Palmetto can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/saw-palmetto |
| Valerian Root | SAFE | 🟢 SAFE — Reishi and Valerian Root can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/valerian-root |
| St. Johns Wort | SAFE | 🟢 SAFE — Reishi and St. Johns Wort can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/st-johns-wort |
| Ginkgo Biloba | SAFE | 🟢 SAFE — Reishi and Ginkgo Biloba can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/ginkgo-biloba |
| Milk Thistle | SAFE | 🟢 SAFE — Reishi and Milk Thistle can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/milk-thistle |
| Echinacea | SAFE | 🟢 SAFE — Reishi and Echinacea can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/echinacea |

## Frequently Asked Questions

### What is the recommended reishi mushroom dosage?

Clinical studies typically use 1-3 grams of standardized reishi extract daily, or 4-6 grams of powdered mushroom. Most commercial supplements provide 500-1000mg of extract standardized to 10-30% polysaccharides and 2-5% triterpenes.

### How long does reishi take to work?

Reishi's effects develop gradually over 4-8 weeks of consistent use, as shown in fatigue studies. Immediate effects are unlikely since reishi works by modulating immune function and cellular metabolism rather than providing acute symptom relief.

### Can reishi mushroom interact with blood pressure medication?

Reishi may lower blood pressure and could potentially enhance the effects of antihypertensive medications. Patients taking blood pressure drugs should monitor their levels closely and consult healthcare providers before using reishi supplements.

### Is reishi safe for autoimmune conditions?

Reishi's immune-modulating effects could theoretically worsen autoimmune conditions by stimulating immune activity. Individuals with conditions like lupus, rheumatoid arthritis, or multiple sclerosis should avoid reishi unless approved by their rheumatologist or neurologist.

### What's the difference between reishi extract and powder?

Reishi extract concentrates bioactive compounds like triterpenes and beta-glucans, requiring smaller doses (1-3g daily). Raw reishi powder contains the whole mushroom at lower concentrations, requiring larger doses (4-6g daily) and may be harder to digest.

### What does the scientific research actually show about reishi's health benefits?

Most reishi research consists of laboratory studies (in vitro) and animal studies rather than human clinical trials, which means evidence is preliminary. While test-tube studies have identified antioxidant compounds like gallic acid and catechins in reishi, and some cell studies suggest antiproliferative activity, these findings have not been confirmed in human populations. Traditional use in Chinese medicine for immune support and fatigue dates back centuries, but this historical application lacks rigorous clinical validation. Any health claims about reishi should be understood as based on traditional use and early-stage research rather than established medical evidence.

### Who should avoid taking reishi supplements?

Reishi may not be appropriate for individuals with autoimmune conditions without medical supervision, as it may modulate immune function in unpredictable ways. People taking anticoagulant or antiplatelet medications should consult a healthcare provider before supplementing, as reishi may have mild anticoagulant properties. Pregnant and breastfeeding women should avoid reishi due to insufficient safety data in these populations. Those with known allergies to fungi or mushrooms should exercise caution or avoid reishi entirely.

### Can I get reishi from food sources, or do I need to take it as a supplement?

Reishi mushrooms are not typically consumed as culinary food in the Western diet, and they are extremely bitter and woody, making them impractical to eat whole. Reishi is traditionally prepared as a decoction (boiled tea) or hot water extract in Asian cultures, but these preparations require extended brewing times to extract bioactive compounds. Commercial reishi supplements use concentrated extracts or powders specifically designed to deliver active constituents more efficiently than whole mushroom consumption. If interested in reishi, supplementation through extracts or powders is the most practical option, as whole reishi mushrooms are not a standard food source.

## Hermetica Products Containing Reishi (Ganoderma lucidum)

- **[Eternity](https://hermeticasuperfoods.com/products/eternity)** — Functional mushroom gummies — Lion's Mane, Reishi, Cordyceps, Chaga & Maitake.
- **[Hush](https://hermeticasuperfoods.com/products/hush-gummies)** — Botanical sleep complex with Reishi, L-Theanine & Chamomile.
- **[Cozy](https://hermeticasuperfoods.com/products/cozy)** — Warming adaptogenic blend for comfort and calm.

> [hermeticasuperfoods.com](https://hermeticasuperfoods.com)

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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