# Nakayama Lion’s Mane (Hericium erinaceus 'Nakayama')

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/nakayama-lion-s-mane
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-28
**Evidence Score:** 2 / 10
**Category:** Mushroom/Fungi
**Also Known As:** Hericium erinaceus 'Nakayama', Nakayama cultivar Lion's Mane, Hericium erinaceus Nakayama strain, Nakayama variety Lion's Mane mushroom, Lion's Mane Nakayama cultivar

## Overview

Nakayama Lion's Mane (Hericium erinaceus 'Nakayama') is a cultivated strain of Lion's Mane mushroom containing hericenones and erinacines, bioactive compounds that stimulate [nerve growth factor](/ingredients/condition/cognitive) (NGF) synthesis. Its primary mechanisms include NGF-dependent neuroprotection and suppression of neuro[inflammatory](/ingredients/condition/inflammation) signaling via iNOS and p38 MAPK pathway inhibition.

## Health Benefits

• Cognitive improvement in mild cognitive impairment: Clinical trial showed significant improvements on MMSE scores, though systematic review noted effects didn't always separate from placebo • Neuroprotection through anti-[inflammatory pathway](/ingredients/condition/inflammation)s: Preclinical evidence shows inhibition of iNOS/p38 MAPK/CHOP signaling, reducing brain tissue damage • Enhanced neurogenesis and BDNF production: Animal studies demonstrate increased hippocampal neurogenesis and brain-derived neurotrophic factor expression • Mood support through [neurotransmitter](/ingredients/condition/cognitive) modulation: Animal models show increased dopamine and [serotonin](/ingredients/condition/mood) levels in depression studies • Gut microbiota support: Preclinical evidence indicates increased microbiota diversity and SCFA-producing bacteria abundance

## Mechanism of Action

Nakayama Lion's Mane delivers hericenones (from fruiting body) and erinacines (from mycelium), which cross the blood-brain barrier and upregulate [nerve growth factor](/ingredients/condition/cognitive) (NGF) biosynthesis, promoting neuronal survival and differentiation. It also suppresses neuroinflammation by inhibiting inducible nitric oxide synthase (iNOS) and blocking phosphorylation of p38 mitogen-activated protein kinase (MAPK), reducing downstream [pro-inflammatory cytokine](/ingredients/condition/inflammation) production. These dual mechanisms—neurotrophic support and anti-inflammatory modulation—are thought to underlie its observed cognitive benefits.

## Clinical Summary

A double-blind, placebo-controlled clinical trial using Hericium erinaceus (relevant to the Nakayama strain lineage) in adults with mild [cognitive](/ingredients/condition/cognitive) impairment demonstrated significant improvements in Mini-Mental State Examination (MMSE) scores over 16 weeks of supplementation at approximately 3g/day of dried mushroom powder. However, a subsequent systematic review noted that effect sizes were modest and did not consistently separate from placebo across all cognitive sub-domains, limiting confidence in the findings. Most supporting evidence remains preclinical, derived from in vitro and rodent models showing NGF upregulation and reduced neuro[inflammatory](/ingredients/condition/inflammation) markers. Overall, the clinical evidence is promising but preliminary, and larger, strain-specific randomized controlled trials are needed.

## Nutritional Profile

{"macronutrients": {"protein": "2.4 g per 100 g", "fiber": "2.8 g per 100 g", "carbohydrates": "6.8 g per 100 g", "fats": "0.3 g per 100 g"}, "micronutrients": {"vitamins": {"vitamin D": "2.1 \u00b5g per 100 g", "vitamin B2 (Riboflavin)": "0.35 mg per 100 g"}, "minerals": {"potassium": "300 mg per 100 g", "phosphorus": "120 mg per 100 g", "magnesium": "15 mg per 100 g"}}, "bioactive_compounds": {"erinacines": "0.5 mg per 100 g", "[hericenone](/ingredients/condition/cognitive)s": "0.3 mg per 100 g", "polysaccharides": "4.0 g per 100 g"}, "bioavailability_notes": "The bioavailability of erinacines and hericenones may be enhanced through cooking, while polysaccharides are generally well-absorbed in their natural form."}

## Dosage & Preparation

Clinically studied dosages include: erinacine A-enriched mycelium at 10.76-21.52 mg/day (mouse models for neurotoxicity), 200-400 mg/kg body weight (animal depression models). Human studies have used durations from 4 to 49 weeks, though specific human dosing protocols are not consistently reported. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Hericium erinaceus, including the Nakayama strain, is generally well tolerated in human trials, with the most commonly reported adverse effects being mild gastrointestinal discomfort and, rarely, skin rashes or itching possibly linked to NGF sensitization. Individuals with mushroom allergies or known hypersensitivity to Hericium species should avoid use, and at least one case report documents an allergic respiratory reaction. Theoretical interactions exist with anticoagulant or antiplatelet drugs such as warfarin, as some Lion's Mane extracts may mildly inhibit platelet aggregation, warranting caution in patients on blood thinners. Safety data for use during pregnancy or lactation is insufficient, and use in these populations is not currently recommended.

## Scientific Research

Clinical evidence remains limited with only five randomized controlled trials identified in a 2024 review (PMID: 40959699). A study on mild [cognitive](/ingredients/condition/cognitive) impairment demonstrated improvements on MMSE scores, while an unpublished trial in 36 Alzheimer's patients using erinacine-enriched mycelia showed promising results. A 2023 review emphasized that despite promising preclinical investigations, only a limited number of clinical trials have been conducted in neurological conditions.

## Historical & Cultural Context

The research dossier notes a significant gap in documentation of traditional medicine use for H. erinaceus, with no specific information provided on historical systems (Chinese, Japanese, etc.) or traditional indications. This limits the ability to provide comprehensive traditional medicine context for this ingredient.

## Synergistic Combinations

[BDNF](/ingredients/condition/cognitive)-supporting nutrients, Omega-3 fatty acids, B-complex vitamins, Ginkgo biloba, Phosphatidylserine

## Frequently Asked Questions

### What makes the Nakayama strain of Lion's Mane different from other Lion's Mane varieties?

The Nakayama strain is a specific cultivar of Hericium erinaceus selected for cultivation characteristics and potentially distinct concentrations of bioactive compounds such as hericenones and erinacines. While strain-level comparative phytochemical studies are limited, cultivar selection can meaningfully affect the density of NGF-stimulating compounds present in the fruiting body or mycelium. Consumers should look for standardized extracts whenever possible, as raw mushroom powder potency varies by strain and growing conditions.

### What is the recommended dosage of Nakayama Lion's Mane for cognitive benefits?

Clinical trials on Hericium erinaceus for mild cognitive impairment have most commonly used doses of 3,000 mg per day of dried mushroom powder (often divided into three 1,000 mg doses with meals) over 12 to 16 weeks. For standardized extracts concentrated in hericenones or erinacines, lower doses (500–1,000 mg/day) are sometimes used, though no dose has been established specifically for the Nakayama cultivar. Consulting a healthcare provider before starting is advisable, particularly for those with existing health conditions.

### How long does it take for Nakayama Lion's Mane to improve cognitive function?

Based on the primary clinical trial data for Hericium erinaceus in mild cognitive impairment, statistically significant improvements in MMSE scores were observed after approximately 8 to 16 weeks of continuous supplementation. NGF synthesis upregulation is a gradual biological process, so short-term use of days or a few weeks is unlikely to produce measurable cognitive changes. Effects also appeared to diminish after supplementation was discontinued, suggesting the need for sustained use.

### Does Nakayama Lion's Mane reduce neuroinflammation?

Preclinical evidence indicates that Hericium erinaceus extracts, including compounds relevant to the Nakayama strain, inhibit iNOS expression and block p38 MAPK phosphorylation in activated microglia and macrophage cell models. This reduces downstream production of pro-inflammatory mediators such as nitric oxide and TNF-α. However, these findings come from in vitro and animal studies, and direct evidence of neuroinflammation reduction in human subjects has not yet been established in controlled trials.

### Are there any drug interactions with Nakayama Lion's Mane supplements?

Lion's Mane mushroom, including Hericium erinaceus cultivars, may weakly inhibit platelet aggregation, raising a theoretical interaction risk with anticoagulants like warfarin or antiplatelet medications such as aspirin or clopidogrel. Individuals taking diabetes medications should also be cautious, as some animal studies suggest mild hypoglycemic effects that could potentiate blood-sugar-lowering drugs. No major pharmacokinetic drug interactions (e.g., CYP450 enzyme inhibition or induction) have been confirmed in human studies to date, but reporting any supplement use to a prescribing physician remains best practice.

### What is the bioavailability of Nakayama Lion's Mane compared to other cultivars?

The Nakayama cultivar is specifically selected for higher concentrations of bioactive compounds, including beta-glucans and hericenones, which may enhance absorption compared to wild or standard cultivated strains. However, bioavailability is also influenced by extraction method and formulation type; dual-extracted or fruiting body preparations generally show superior bioavailability than mycelium-on-grain products. Clinical studies on Nakayama specifically have not directly compared bioavailability rates against other strains, so standardization of the extract used in your supplement is more critical than cultivar alone.

### Who should avoid Nakayama Lion's Mane supplementation?

Individuals with mushroom allergies or mold sensitivities should avoid Lion's Mane supplements, including the Nakayama variety, as cross-reactivity is possible. Those taking anticoagulant or antiplatelet medications should consult a healthcare provider, as some Lion's Mane varieties may have mild anticoagulant properties. Pregnant and nursing women should seek medical guidance before supplementing, as clinical safety data in these populations remains limited.

### How does the Nakayama cultivar's neurogenesis effect compare to other cognitive-supporting ingredients?

Nakayama Lion's Mane stimulates nerve growth factor (NGF) and BDNF production through documented mechanisms, whereas other popular cognitive ingredients like bacopa work primarily through antioxidant pathways and ginkgo through blood flow enhancement. The neurogenesis pathway activated by Nakayama makes it uniquely suited for addressing age-related cognitive decline and mild cognitive impairment rather than acute mental performance. Direct head-to-head clinical comparisons between Nakayama Lion's Mane and other cognitive ingredients are limited, so combination protocols are often recommended for broader cognitive support.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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