Ganoderma lucidum 'Shi Zhi'

Ganoderma lucidum 'Shi Zhi' is a specific cultivar of reishi mushroom containing bioactive polysaccharides and immunomodulating proteins like LZ-8. The polysaccharides may influence immune cell activity and tumor suppression pathways, though clinical evidence remains limited.

Origin & History

Ganoderma lucidum 'Shi Zhi' is a cultivated Chinese cultivar variant of reishi mushroom, taxonomically identified as conspecific with G. sichuanense based on molecular analyses. It is widely cultivated in China on wood substrates, producing fruiting bodies with characteristic reniform to subcircular pileus shape, laccate surface, and whitish pore surface (4-6 pores per mm).

Historical & Cultural Context

In Traditional Chinese Medicine, G. lucidum (Ling-zhi) has been used for over 2,000 years as an 'immortality herb' (xiancao) for spiritual potency and longevity. Historical texts like Bencao Gangmu (16th century) describe its use to produce 'spirithood' and extend life by thousands of years, with different colored variants claimed to benefit specific organs.

Health Benefits

• No clinical evidence available - research lacks human trials for 'Shi Zhi' cultivar
• General G. lucidum contains bioactive polysaccharides with potential antitumorigenic properties (preliminary evidence only)
• Contains proteins like LZ-8 with immunosuppressive properties (in-vitro evidence only)
• Traditional use for longevity and spiritual potency (historical use, no clinical validation)
• Traditional organ-specific benefits claimed in TCM texts (no modern clinical evidence)

How It Works

The polysaccharides in Ganoderma lucidum 'Shi Zhi' may modulate immune cell signaling pathways and cytokine production, potentially affecting tumor suppression mechanisms. The protein LZ-8 demonstrates immunosuppressive properties by influencing T-cell proliferation and activation in laboratory studies. These compounds may interact with immune system receptors, though specific molecular pathways require further investigation.

Scientific Research

No human clinical trials, RCTs, or meta-analyses were found specifically for the 'Shi Zhi' cultivar in the research dossier. The available research is limited to taxonomic descriptions and general information about G. lucidum compounds without clinical validation or PMIDs.

Clinical Summary

No clinical trials have specifically examined the 'Shi Zhi' cultivar of Ganoderma lucidum in humans. General Ganoderma lucidum research includes small-scale human studies showing potential immune system effects, but sample sizes typically range from 20-100 participants. Most evidence supporting antitumorigenic and immunomodulating properties comes from in-vitro laboratory studies and animal models. The lack of human trials for this specific cultivar makes clinical efficacy claims premature.

Nutritional Profile

Ganoderma lucidum 'Shi Zhi' (Red Reishi) nutritional composition is primarily characterized by its bioactive compounds rather than conventional macronutrients, as it is typically consumed in dried/extracted form rather than as a whole food. Based on available data for G. lucidum species (cultivar-specific data limited): Macronutrients (per 100g dry weight): Protein 10-18g (including immunomodulatory proteins such as LZ-8 and fungal immunomodulatory proteins/FIPs); Carbohydrates 65-75g (predominantly complex polysaccharides including beta-1,3 and beta-1,6 glucans estimated at 1-8g/100g dry weight, with reported ranges varying significantly by cultivation substrate and harvest stage); Total fat 1.5-3.5g (including ergosterol as provitamin D2 precursor); Dietary fiber 50-60g (predominantly indigestible chitin-bound glucans, low bioavailability in whole fruiting body form). Key Bioactive Compounds: Triterpenoids (ganoderic acids A, B, C, D, G, H, and related lanostane-type triterpenes) at approximately 1-3% of dry weight, concentrated in fruiting body and spores; beta-glucan polysaccharides (GLP) at 1-5% dry weight with molecular weights ranging 4×10^4 to 1.8×10^6 Da, bioavailability enhanced via hot water extraction; Adenosine and related nucleosides present at trace levels (~0.1-0.5mg/g dry weight). Micronutrients: Potassium approximately 350-450mg/100g dry weight; Phosphorus 150-220mg/100g; Magnesium 40-80mg/100g; Zinc 4-8mg/100g; Copper 0.5-1.5mg/100g; Iron 3-6mg/100g. Vitamins: Ergosterol (pro-vitamin D2) approximately 0.3-1.5mg/g dry weight, conversion to vitamin D2 requires UV exposure; B-vitamins present in trace amounts including niacin (~4-6mg/100g) and riboflavin (~0.2-0.4mg/100g). Bioavailability Notes: Raw or unprocessed fruiting body has poor bioavailability of polysaccharides and triterpenes due to chitin cell wall matrix; hot water extraction (decoction at 70-100°C) significantly improves polysaccharide bioavailability; dual extraction (water + ethanol) required to solubilize both hydrophilic polysaccharides and lipophilic triterpenes; spore powder (cracked cell wall) reported to have higher triterpene bioavailability than fruiting body powder; 'Shi Zhi' cultivar-specific concentration data for bioactives is not independently documented in peer-reviewed literature and is assumed to align broadly with standard G. lucidum fruiting body ranges.

Preparation & Dosage

No clinically studied dosage ranges are reported for 'Shi Zhi' cultivar in any form (extract, powder, or standardized). Traditional texts mention inch-square spoonfuls of powdered, shade-dried forms but lack modern dosage validation. Consult a healthcare provider before starting any new supplement.

Synergy & Pairings

Other reishi variants, cordyceps, turkey tail, maitake, shiitake

Safety & Interactions

Ganoderma lucidum supplements may cause dizziness, dry mouth, and gastrointestinal upset in some individuals. The mushroom may interact with anticoagulant medications due to potential blood-thinning effects. Individuals with autoimmune conditions should use caution due to the immunomodulating properties of compounds like LZ-8. Safety during pregnancy and breastfeeding has not been established for this specific cultivar.