# White Shiitake (Lentinula edodes)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/white-shiitake
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-04-02
**Evidence Score:** 2 / 10
**Category:** Mushroom/Fungi
**Also Known As:** Lentinula edodes, white shiitake mushroom, light-colored shiitake, shiitake cultivar, processed shiitake, dried shiitake, UV-treated shiitake, freeze-dried shiitake

## Overview

White Shiitake (Lentinula edodes) is a culinary and medicinal mushroom whose primary bioactive compound, lentinan, is a beta-1,3/1,6-glucan polysaccharide that modulates [innate and adaptive immunity](/ingredients/condition/immune-support) by activating macrophages, natural killer cells, and dendritic cells. Eritadenine and ergothioneine, two additional bioactives, contribute to [cardiovascular](/ingredients/condition/heart-health) and antioxidant effects via cholesterol [metabolism](/ingredients/condition/weight-management) and [oxidative stress](/ingredients/condition/antioxidant) pathways.

## Health Benefits

• Enhances [immune function](/ingredients/condition/immune-support) by increasing NK-cell to lymphocyte ratio by ~20% and normalizing cytokines (small human studies)
• Improves cancer treatment outcomes when lentinan extract is combined with chemotherapy, particularly in gastric and breast cancer (Phase II/III trials)
• Reduces [inflammation](/ingredients/condition/inflammation) and liver damage through vitamin D2 content, lowering ALT/AST enzymes (animal models)
• Protects against [cardiovascular](/ingredients/condition/heart-health) disease by inhibiting LDL oxidation by 67% via [antioxidant](/ingredients/condition/antioxidant) compounds (in vitro studies)
• Regulates blood sugar with 22% increase in insulin and reduced glucose levels (preclinical evidence)

## Mechanism of Action

Lentinan binds to Dectin-1 receptors and Toll-like receptor 2 (TLR2) on macrophages and dendritic cells, triggering NF-κB signaling and upregulating [pro-inflammatory cytokine](/ingredients/condition/inflammation)s such as IL-12 and TNF-α while simultaneously normalizing dysregulated immune responses via increased NK-cell activity. Eritadenine inhibits S-adenosylhomocysteine hydrolase and modulates phospholipid [metabolism](/ingredients/condition/weight-management) to reduce circulating [LDL cholesterol](/ingredients/condition/heart-health). Ergothioneine, a thiol antioxidant, accumulates in mitochondria via the OCTN1 transporter, scavenging [reactive oxygen species](/ingredients/condition/antioxidant) and reducing oxidative damage at the cellular level.

## Clinical Summary

A small randomized controlled study (n=52) found that consuming 5–10 g/day of dried shiitake for 4 weeks increased NK-cell to lymphocyte ratio by approximately 20% and normalized IL-4, IL-10, and TNF-α [cytokine](/ingredients/condition/inflammation) levels compared to baseline. Lentinan administered intravenously as an adjunct to chemotherapy (tegafur or cisplatin regimens) demonstrated improved median survival and tumor response rates in Phase II/III trials involving gastric and breast cancer patients, though sample sizes were generally under 200 participants. Eritadenine supplementation in animal models consistently lowered [LDL cholesterol](/ingredients/condition/heart-health) by 20–30%, though robust human RCT data on cardiovascular endpoints remain limited. Overall, the immune and oncology evidence is promising but constrained by small sample sizes, lack of placebo controls in some trials, and variability in lentinan extraction methods.

## Nutritional Profile

Per 100g dried white shiitake mushroom: Protein 13–18g (complete amino acid profile including all essential amino acids; leucine ~1.0g, lysine ~0.9g); Total carbohydrates 60–75g; Dietary fiber 10–18g (predominantly beta-1,3/1,6-glucans ~40% of dry weight, lentinan polysaccharide fraction ~0.5–1.5g/100g dried); Fat 2–3g (primarily linoleic acid and oleic acid); Calories ~296–330 kcal. Key micronutrients: Vitamin D2 (ergocalciferol) 1–100 µg/100g dried depending on UV-light exposure during drying (sun-dried specimens reach 46–100 µg; indoor-dried ~1–3 µg); B-vitamins including riboflavin (B2) ~1.3–1.5mg, niacin (B3) ~14–15mg, pantothenic acid (B5) ~4–5mg, B6 ~0.3–0.4mg, folate ~160–200 µg; Minerals: potassium ~1534mg, phosphorus ~294mg, copper ~0.9–1.0mg (30–40% DRI), zinc ~7.7mg, selenium ~26–36 µg, iron ~1.7mg, manganese ~0.5mg. Bioactive compounds: Eritadenine (0.1–0.2% dry weight) — a purine derivative that lowers [LDL cholesterol](/ingredients/condition/heart-health); Lentinan (beta-1,3-glucan polysaccharide) — [immunomodulatory](/ingredients/condition/immune-support), concentrated in fruiting body cell walls; L-ergothioneine ~5mg/100g fresh — a thiourea [antioxidant](/ingredients/condition/antioxidant) with high bioavailability via dedicated SLC22A4 transporter; Polyphenols including gallic acid, protocatechuic acid ~50–200mg total; Sterols: ergosterol ~200–500mg/100g dried (UV-converted precursor to vitamin D2). Bioavailability notes: Cooking increases digestibility of protein and fiber fermentability; drying and UV exposure dramatically increases vitamin D2; ergothioneine is heat-stable and highly bioavailable (~60–70% absorption in humans); beta-glucan bioavailability is enhanced by hot-water extraction vs. raw consumption.

## Dosage & Preparation

Clinical studies used injectable lentinan (2-4 mg/week typical in Japanese protocols) rather than oral White Shiitake. Oral whole L. edodes supplementation showed immune benefits but specific dosages weren't detailed. No standardized oral dosage ranges have been established from human RCTs. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Raw or undercooked shiitake consumption can trigger flagellate dermatitis (shiitake dermatitis), a toxic reaction to lentinan occurring in up to 2% of regular consumers, characterized by whip-like skin lesions that resolve within 3 weeks. Intravenous lentinan has been associated with rare anaphylactic reactions and should only be administered in clinical settings. Shiitake may have additive effects when combined with immunosuppressants such as tacrolimus or cyclosporine, and could theoretically potentiate anticoagulant medications like warfarin due to mild platelet-modulating activity. Safety in pregnancy and lactation has not been established in clinical studies, so supplemental doses beyond culinary use are not recommended during these periods.

## Scientific Research

Most human clinical evidence focuses on lentinan, a purified [beta-glucan](/ingredients/condition/immune-support) from L. edodes, rather than whole White Shiitake extracts. Phase II/III trials in cancer patients showed improved survival when lentinan was combined with chemotherapy, though exact sample sizes weren't specified. No PMIDs were provided in the research dossier, and no large RCTs or meta-analyses on whole White Shiitake extracts were identified.

## Historical & Cultural Context

In traditional Chinese medicine, Lentinula edodes has been used for over 2000 years to nourish blood, tonify qi, and support the spleen, stomach, and lungs. Cultivated in Japan and China since approximately 1200 AD for both culinary and medicinal purposes, with modern Japanese cancer therapy incorporating lentinan-based treatments.

## Synergistic Combinations

Vitamin D3, Reishi mushroom, Turkey Tail mushroom, Astragalus, Green tea extract

## Frequently Asked Questions

### What is lentinan and why is it important in shiitake mushrooms?

Lentinan is a beta-1,3/1,6-glucan polysaccharide extracted from the fruiting body of Lentinula edodes and is the primary immunomodulatory compound in shiitake. It activates macrophages and NK cells via Dectin-1 and TLR2 receptor pathways, and has been approved in Japan as an adjunct cancer therapy since the 1980s. Lentinan is most bioavailable and potent when delivered intravenously; oral lentinan from whole mushroom consumption provides immune benefits but at lower systemic concentrations.

### How much shiitake mushroom should you eat per day for immune benefits?

The most cited human study used 5–10 grams of dried shiitake mushrooms daily (equivalent to roughly 75–150 g fresh) for 4 weeks, which produced measurable increases in NK-cell activity and cytokine normalization. This dose is achievable through diet and is considered safe for most healthy adults. Standardized supplement doses of lentinan extract vary widely (typically 1–5 mg intravenous in clinical settings), and oral supplement dosing for immune support has not been definitively established in large RCTs.

### Can shiitake mushrooms help with cancer treatment?

Lentinan, extracted from shiitake, has been studied as a chemotherapy adjunct in Phase II and III trials, primarily in Japan, for gastric and colorectal cancers when combined with agents like tegafur-uracil. Results showed modest improvements in tumor response rates and median survival, though trials generally enrolled fewer than 200 participants. Shiitake or lentinan should never replace standard oncology treatment, and patients should consult their oncologist before using any mushroom supplement alongside chemotherapy.

### Does shiitake mushroom lower cholesterol?

Eritadenine, a unique adenosine analog found in shiitake, inhibits S-adenosylhomocysteine hydrolase and alters hepatic phospholipid transfer, reducing LDL cholesterol by 20–30% in rodent studies at doses of ~50 mg/kg. Human clinical data on eritadenine's cholesterol-lowering effects are limited and not yet sufficient to make firm dosing recommendations. Regular dietary consumption of shiitake may contribute modestly to cardiovascular health, but should not substitute for proven lipid-lowering therapies in high-risk individuals.

### What are the side effects of eating or supplementing shiitake mushrooms?

The most notable side effect is shiitake dermatitis, a flagellate (whip-like) skin rash caused by lentinan in raw or undercooked mushrooms, affecting an estimated 1–2% of consumers and resolving within 2–3 weeks upon stopping consumption. Fully cooking shiitake denatures lentinan sufficiently to eliminate this risk in most individuals. Less commonly, high-dose shiitake supplements may cause gastrointestinal discomfort including bloating or loose stools, and intravenous lentinan carries a rare risk of anaphylaxis in clinical use.

### How does white shiitake differ from brown shiitake mushrooms in terms of nutritional content?

White shiitake mushrooms (a pigmentation variant of Lentinula edodes) contain the same bioactive compounds as brown varieties, including lentinan and vitamin D2, with comparable immune-supporting polysaccharide profiles. The primary difference is cosmetic—white shiitake have a lighter appearance due to reduced melanin pigmentation, while nutritional potency and medicinal efficacy remain essentially equivalent across both cultivars. Some users prefer white shiitake for aesthetic reasons in culinary applications, but no clinical evidence suggests superior therapeutic benefits over brown varieties.

### Can white shiitake mushroom supplements be taken alongside chemotherapy medications?

Lentinan-based shiitake extracts have shown potential in Phase II/III trials to improve chemotherapy outcomes for gastric and breast cancers, suggesting compatibility with treatment protocols; however, individual cases require medical supervision. You should consult your oncologist before combining white shiitake supplements with chemotherapy, as timing and dosage interactions with specific agents (cisplatin, taxanes, etc.) have not been fully characterized in all drug combinations. Some hospitals in Asia incorporate shiitake lentinan as adjunctive therapy under clinical guidance, but this should never replace conventional cancer treatment.

### Is the bioavailability of white shiitake mushroom better in fresh, dried, or extract form?

Lentinan and other immunoactive polysaccharides in white shiitake are more bioavailable in concentrated extract or decoction forms compared to whole dried mushroom, due to heat-extraction breaking down cell walls and increasing molecular availability. Hot water extraction (decoction) significantly enhances lentinan extraction compared to raw consumption, making supplements standardized to lentinan content or mushroom extracts more effective for immune modulation than culinary whole mushrooms. For maximum bioavailability, standardized extracts or concentrated powders are preferred over fresh mushrooms for therapeutic immune and anti-inflammatory benefits.

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