Overview
Coriolus Versicolor (Yunzhi) is a polypore mushroom with a long history in East Asian traditional medicine. It grows on decaying hardwood logs and is recognizable by its vibrant, fan-shaped fruiting bodies. Modern research focuses on its bioactive compounds, particularly polysaccharopeptides (PSP) and polysaccharide-K (PSK), which are linked to immune system modulation and anti-cancer effects. In traditional Chinese medicine, Yunzhi is classified as a 'tonic herb' believed to strengthen Qi (vital energy) and resolve dampness. Its use dates back centuries, and today it is integrated into both herbal formulations and evidence-based therapies, especially in Japan and China.
Physical and Chemical Properties
Yunzhi's fruiting body is thin and flexible, with concentric bands of brown, white, and blue hues. The mushroom contains complex polysaccharides, triterpenoids, and proteins, which contribute to its therapeutic effects. PSP and PSK, the most studied compounds, are water-soluble polysaccharide-protein complexes with molecular weights ranging from 50 to 100 kDa. These compounds exhibit strong immunostimulatory properties by activating macrophages, T-cells, and natural killer cells. The mushroom's antioxidant capacity is attributed to phenolic compounds and flavonoids, which scavenge free radicals. Solubility varies by compound, with polysaccharides extractable via hot water or alcohol methods.
Main Applications
Yunzhi is primarily used in immune support and oncology. In Japan, PSK (Krestin) is an approved adjuvant for gastric and colorectal cancer therapy, often combined with chemotherapy. PSP, another extract, is widely marketed in China and Hong Kong for chronic fatigue and hepatitis B management. Beyond medicine, Yunzhi is formulated into teas, capsules, and powders as a dietary supplement. Its extracts are also studied for antiviral and antimicrobial applications. In B2B markets, demand is driven by nutraceutical manufacturers, herbal product distributors, and research institutions focusing on immuno-oncology.
Safety and Storage
Coriolus Versicolor is generally considered safe, with rare reports of mild digestive discomfort. However, patients on immunosuppressants should use it cautiously due to its immune-stimulating effects. Pregnant or breastfeeding women should consult a healthcare provider before use. For storage, dried Yunzhi should be kept in airtight containers in a cool, dark place to preserve its bioactive compounds. Extracts require refrigeration after opening. Suppliers should provide certificates of analysis (CoA) to confirm the absence of heavy metals or contaminants, especially for wild-harvested material.
B2B Procurement Guide
B2B buyers should prioritize suppliers with Good Agricultural and Collection Practices (GACP) certification to ensure quality and sustainability. Key procurement considerations include extraction methods (e.g., hot water vs. dual extraction), polysaccharide content (typically 30-40% for premium grades), and third-party lab testing for potency and purity. Prices vary by form (whole mushroom, powder, or extract) and potency. Bulk purchases of standardized extracts (e.g., 50% polysaccharides) may cost $30-$50/kg, while organic-certified material commands a premium. Long-term contracts are advisable due to seasonal availability and fluctuating wild harvest yields.
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