Shimeji Mushroom (Hypsizygus tessellatus)

Shimeji mushroom (Hypsizygus tessellatus) contains beta-glucans and ergosterol compounds that may modulate immune function. Current research is limited to occupational exposure studies in mushroom farm workers rather than therapeutic applications.

Origin & History

Shimeji mushroom (Hypsizygus tessellatus), also known as Bunashimeji, is an edible mushroom cultivated primarily in East Asia. Commercial production involves controlled indoor cultivation, though the available research focuses primarily on occupational health concerns for farm workers exposed to mushroom spores rather than therapeutic applications.

Historical & Cultural Context

No information about traditional or historical medicinal use of shimeji mushrooms was found in the provided research. The available literature only addresses modern commercial cultivation and occupational health concerns.

Health Benefits

• Insufficient clinical evidence available - the provided research only documents occupational exposure concerns in mushroom farm workers
• No therapeutic benefits documented in the available research
• The single relevant study (PMID not provided) examined immune system changes in workers, not health benefits
• No bioactive compound studies or clinical trials were found in the provided research
• Traditional use claims cannot be verified from the available scientific literature

How It Works

Shimeji mushrooms contain beta-glucans that interact with immune cell receptors including Dectin-1 and complement receptor 3, potentially stimulating macrophage and natural killer cell activity. The ergosterol content may also influence vitamin D metabolism pathways. However, specific mechanisms remain poorly characterized due to limited research on this species.

Scientific Research

The available research is extremely limited, with only one study examining immune responses in mushroom farm workers exposed to Bunashimeji spores, focusing on occupational health rather than therapeutic applications. No clinical trials, meta-analyses, or pharmacological studies investigating shimeji mushrooms as a health supplement were found in the provided research dossier.

Clinical Summary

Clinical evidence for shimeji mushroom is extremely limited, with available research focusing on occupational health effects in mushroom farm workers rather than therapeutic benefits. The existing study examined immune system changes in exposed workers but did not establish therapeutic efficacy. No controlled trials have evaluated shimeji mushroom supplementation for health benefits. Current evidence is insufficient to support specific health claims.

Nutritional Profile

Shimeji mushroom (Hypsizygus tessellatus) is a low-calorie, nutrient-dense fungus. Per 100g fresh weight: Energy ~22 kcal, Protein 2.7–3.5g (containing all essential amino acids including glutamic acid and aspartic acid as predominant free amino acids contributing to umami flavor), Carbohydrates 4.0–5.0g, Dietary Fiber 1.3–2.5g (predominantly beta-glucans including β-1,3/1,6-glucans estimated at 15–25% of dry weight, which are the primary bioactive polysaccharides), Fat 0.2–0.4g, Water ~90–92g. Micronutrients: Potassium ~300–370mg/100g (one of the highest mineral contributors), Phosphorus ~80–100mg/100g, Copper ~0.3–0.5mg/100g, Selenium ~2–5μg/100g, Zinc ~0.5–0.8mg/100g, Iron ~0.5–1.0mg/100g. Vitamins: Niacin (B3) ~5–7mg/100g dry basis, Riboflavin (B2) ~0.2–0.4mg/100g, Pantothenic acid (B5) ~1.0–2.0mg/100g, Vitamin D2 (ergocalciferol) present in trace amounts in fresh form but increases significantly (estimated 10–100μg/100g dry weight) upon UV light exposure due to ergosterol conversion; ergosterol content estimated at 3–7mg/100g fresh weight. Bioactive compounds: Beta-glucan polysaccharides (primary immunomodulatory compounds), eritadenine (present in trace amounts compared to shiitake), lectins, and phenolic compounds (total phenolics ~5–15mg GAE/100g fresh weight). Chitin comprises ~2–5% of dry weight forming the cell wall. Bioavailability notes: Beta-glucans have limited raw bioavailability; cooking disrupts cell walls and increases nutrient release. Ergosterol-to-vitamin D2 conversion requires UV exposure post-harvest. Protein digestibility is moderate (~60–70%) due to chitin matrix encapsulation.

Preparation & Dosage

No clinically studied dosage ranges are available from the provided research. The single study focused on occupational exposure to spores rather than therapeutic supplementation. Consult a healthcare provider before starting any new supplement.

Synergy & Pairings

Insufficient evidence to recommend synergistic combinations

Safety & Interactions

Safety data for shimeji mushroom supplementation is limited, though culinary consumption appears generally safe for most individuals. Occupational exposure studies suggest potential immune system effects, but clinical significance remains unclear. No documented drug interactions are available due to lack of research. Pregnant and breastfeeding women should avoid supplementation due to insufficient safety data.