Mushroom · Other

Japanese Shiitake

Provisional Strong Scorebotanical

Hermetica Superfood Encyclopedia

Published March 18, 2026Last updated March 18, 2026Methodology · Editorial policy · Report an error

Evidence review status: unreviewed

Legacy index-continuity record: the score and narrative are provisional and must not be represented as validated or human-approved.

Review flags: AWAITING_SEMANTIC_VALIDATION

Provisional Summary

Japanese Shiitake mushrooms contain high concentrations of beta-glucans, particularly lentinan, which activate immune system macrophages and natural killer cells. These bioactive polysaccharides also inhibit HMG-CoA reductase enzyme activity, leading to measurable cholesterol reduction.

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Screened PMID Records

Reported Benefits

Pending

Synergy Review

At a Glance

CategoryMushroom

GroupOther

Public Score StatusProvisional Strong

Primary KeywordJapanese Shiitake benefits

Japanese Shiitake close-up macro showing natural texture and detail — rich in immunomodulatory, antiviral, antioxidant

Japanese Shiitake — botanical close-up

Reported Benefits (Provisional)

Supports immune function with beta-glucans, which enhance macrophage activity, crucial for pathogen defense. - Promotes cardiovascular health by reducing cholesterol levels, as shown in studies with a 7% decrease. - Aids in weight management by regulating blood sugar levels, helping prevent insulin spikes. - Contains eritadenine, which supports liver health by aiding in the breakdown of cholesterol. - Enhances skin health with its antioxidant properties, reducing oxidative stress and signs of aging. - Boosts energy levels through its rich vitamin B content, essential for cellular energy production. - Supports gut health by promoting beneficial gut bacteria, improving digestion and nutrient absorption.

Origin & History

Natural habitat

Japanese Shiitake, scientifically known as Lentinula edodes, is a popular edible mushroom native to East Asia. It is cultivated extensively in Japan and is a staple in Asian cuisine.

“Shiitake mushrooms have been cultivated in Japan for centuries, valued not only for their culinary uses but also for their medicinal properties in traditional Asian medicine.”Traditional Medicine

Research Narrative (Provisional)

Research supports Shiitake's role in boosting immunity and lowering cholesterol. Studies continue to explore its potential anti-cancer properties.

Preparation & Dosage

Dosage guidance is withheld because the publication gate has not recorded adequate support for this profile.

Nutritional Profile

- High in protein, essential for muscle repair and growth. - Contains B vitamins, supporting energy metabolism. - Rich in selenium, an antioxidant that protects cells.

Reported Mechanism (Provisional)

Mechanism of Action

Lentinan and other beta-glucans in Japanese Shiitake bind to dectin-1 receptors on immune cells, triggering complement activation and cytokine release. The compound eritadenine inhibits HMG-CoA reductase, reducing cholesterol synthesis in the liver. Beta-glucans also slow glucose absorption by increasing intestinal viscosity, improving insulin sensitivity.

Clinical Narrative (Provisional)

Randomized controlled trials with 40-90 participants showed Japanese Shiitake extract (6-10g daily) reduced total cholesterol by 7% and LDL by 10% over 4-12 weeks. Immune studies demonstrated 20-30% increases in natural killer cell activity after 4 weeks of supplementation. Weight management studies are limited, with only small pilot trials showing modest improvements in glucose tolerance. Evidence is strongest for cholesterol reduction, moderate for immune support.

Also Known As

Lentinula edodesShiitakeXiang GuBlack Forest MushroomOak MushroomDonkoKoshinShanku

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These statements have not been evaluated by the Food and Drug Administration. This content is for informational purposes only and is not intended to diagnose, treat, cure, or prevent any disease.

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