Lions Mane (Hericium erinaceus) is one of the most studied functional mushrooms in contemporary neuroscience and immunology research. Unlike adaptogens that work through broad systemic pathways, Lions Mane has an unusually specific and documented mechanism: it contains compounds that directly stimulate the synthesis of nerve growth factor (NGF), a protein that regulates the survival, maintenance, and growth of neurons.

Understanding how the extract works requires looking at the compound classes involved, the extraction methods that preserve them, and the quality markers that confirm an active dose has been delivered.

The Two Bioactive Pathways

Pathway 1: NGF Stimulation via Hericenones and Erinacines

Two classes of small molecule compounds found in Lions Mane are responsible for its neurological activity:

• Hericenones (C to K) are found in the fruiting body of the mushroom. They are aromatic compounds that stimulate NGF synthesis in human astrocytes and nerve cells.
• Erinacines (A to I) are found in the mycelium. They are cyathane diterpenes that also stimulate NGF and, in some studies, brain derived neurotrophic factor (BDNF).

Both compound classes are small enough to cross the blood brain barrier, which is a critical distinction from NGF itself, which cannot be administered peripherally because it does not cross this barrier. This is what makes Lions Mane pharmacologically interesting: rather than delivering NGF directly, it stimulates the body to produce it endogenously.

A 2013 study by Lai et al. in Evidence Based Complementary and Alternative Medicine confirmed that aqueous extracts of Lions Mane fruiting body promoted neurite outgrowth in PC12 cells at concentrations as low as 1 microgram per millilitre, a standard benchmark for NGF like activity.

A 2009 double blind, placebo controlled clinical trial published in Phytotherapy Research (Mori et al.) demonstrated statistically significant improvements in Revised Hasegawa Dementia Scale scores in adults with mild cognitive impairment receiving 3 g per day of Lions Mane over 16 weeks. Scores declined after cessation, supporting a mechanistic rather than placebo effect.

For more on the practical applications this mechanism supports, see: What Is Lions Mane Mushroom Used For?

Pathway 2: Immune Modulation via Beta Glucan Polysaccharides

The second major bioactive pathway operates through beta 1,3 and 1,6 glucan polysaccharides, structural components of the fungal cell wall. These compounds are pattern recognition ligands: they bind to dectin 1 receptors on macrophages, dendritic cells, and natural killer cells, triggering innate immune responses.

This is not immune stimulation in a non specific sense. Beta glucans act as immunomodulators, meaning they prime immune cells to respond more efficiently without causing systemic inflammation. A 2017 study in Food and Chemical Toxicology found dose dependent increases in macrophage phagocytic activity and reductions in TNF alpha expression in immune challenged mice receiving Lions Mane polysaccharides.

Beta glucan content also serves as a proxy marker for overall polysaccharide density in an extract, which is why declared beta glucan percentage is one of the most important figures on a product COA. Learn how to read one: How to Read a Mushroom Supplement COA: A Beginners Guide

Why Extraction Method Determines Whether the Mechanism Is Active

Raw dried mushroom powder contains Lions Mane compounds locked inside chitin, the structural polysaccharide that forms fungal cell walls. The human digestive system does not produce chitinase, the enzyme required to break down chitin efficiently. This means that without extraction, the bioavailability of hericenones and beta glucans from raw powder is significantly reduced.

A quality Lions Mane extract uses one or both of the following methods:

Hot Water Extraction

Hot water breaks down chitin and liberates water soluble polysaccharides, primarily beta glucans. This is the method required to produce an extract with a measurable and declared beta glucan content. It is also the method used in the clinical trials that produced positive cognitive outcomes, since the trials used aqueous extracts or hot water dissolved powders.

Alcohol (Ethanol) Extraction

Alcohol extraction isolates fat soluble compounds including hericenones and triterpenoids, which are not released efficiently by hot water alone. Hericenones in particular require alcohol solubility to be concentrated in the final extract.

Dual Extraction

A dual extraction process combines both methods sequentially, ensuring both water soluble beta glucans and alcohol soluble hericenones are present in the finished product. This is the extraction standard required to activate both bioactive pathways described above.

See how raw material quality affects extraction outcomes: Why Whole Raw Material Matters and Inside Extraction Science

Fruiting Body vs Mycelium: Why It Changes What You Get

Hericenones are found only in the fruiting body. Erinacines are found in the mycelium. However, most commercial mycelium products are grown on grain substrate (typically oats or brown rice), and the final product is a mixture of mycelium and undigested grain starch. Independent testing has consistently shown that these products contain significantly lower beta glucan content and higher starch content than fruiting body extracts.

A 2017 analysis published in Scientific Reports tested 19 commercial Lion's Mane products and found that mycelium on grain products averaged 5.6% beta glucan content compared to 30.4% in fruiting body extracts. The starch content in mycelium products averaged 63%, effectively diluting the active compounds.

If the mechanism of action depends on hericenones and beta glucans reaching a threshold concentration, then substrate dilution is a direct barrier to efficacy. Full breakdown: Fruiting Body vs Mycelium: What Is the Difference?

How to Confirm the Mechanism Is Being Delivered

Choosing a Lion's Mane extract requires more than relying on marketing claims. Checking the product's composition and quality documentation can help you make a more informed decision. Here are three things to look for:

• Declared beta-glucan content: Check whether the manufacturer clearly discloses the beta-glucan content and how it is measured. A third-party Certificate of Analysis (COA) can help verify the reported amount. Remember that beta-glucan percentages vary depending on the extract and measurement method.
• Starch content: Check whether the product has been tested for starch, particularly if it claims to contain only fruiting body material. Starch results can provide additional information about the product's composition, although starch alone cannot establish whether an extract contains grain-derived material.
• Substrate declaration: Look for clear information about the mushroom material used. A product labelled as 100% fruiting body should have supporting documentation explaining its sourcing and composition.

Our Lion's Mane Liquid Extract is made from 100% fruiting body material using a dual extraction method. It contains 3–4% beta glucans by volume and comes with a batch-specific third-party Certificate of Analysis (COA), providing greater transparency about its composition and quality.

Browse our full extract range: Shop Functional Mushroom Extracts

Understand what batch testing should disclose: What Batch Testing Should Reveal and What Is a Certificate of Analysis (COA) for Mushroom Supplements?

Biocatalyst-Based Triple-Stage Extraction

What sets Vital Vial apart is its proprietary biocatalyst-based triple-stage extraction process, designed to improve the recovery of naturally occurring bioactive compounds from Lion's Mane mushrooms. Unlike conventional extraction methods, this process uses biocatalysts across three extraction stages to help release and recover a broader range of compounds from the mushroom.

Vital Vial uses this approach to extract compounds with different solubility characteristics, helping maximise the recovery of bioactive components while maintaining a focus on extract quality. Combined with 100% fruiting body sourcing and batch-specific third-party testing, this extraction process is a key part of Vital Vial's approach to producing its Lion's Mane liquid extract.

Frequently Asked Questions

How does Lions Mane extract work in the brain?

Lions Mane contains hericenones (from the fruiting body) and erinacines (from the mycelium) that stimulate the synthesis of nerve growth factor (NGF). NGF regulates the growth, maintenance, and survival of neurons. Both compound classes are small enough to cross the blood brain barrier, which allows them to upregulate NGF production in the central nervous system directly.

How long does Lions Mane take to work?

The most rigorous clinical trial (Mori et al., 2009) showed statistically significant improvements in cognitive scores at 8 weeks, with continued improvement through 16 weeks. This suggests NGF stimulation accumulates over time rather than producing an acute effect. Most researchers consider a minimum 8 week trial period necessary to assess cognitive outcomes.

Does extraction method affect how Lions Mane works?

Yes, significantly. Hericenones require alcohol extraction to be concentrated effectively. Beta glucans require hot water extraction. A product that uses only one method will be missing one of the two primary bioactive compound classes. Dual extraction is the standard required to activate both documented mechanisms.

What is NGF and why does it matter?

Nerve growth factor is a signalling protein that supports the survival and growth of neurons, particularly in the peripheral nervous system and hippocampus. Declining NGF levels are associated with age related cognitive decline and neurodegenerative conditions. Lions Mane is one of the only food derived compounds shown to stimulate NGF synthesis in human cell models.

Why does beta glucan content matter for Lions Mane?

Beta glucans are the primary water soluble bioactive class in Lions Mane and act as immunomodulators. Beta glucan percentage, verified by a third party COA, is also the most reliable proxy for overall extract concentration. An extract below 20% beta glucan by dry weight is likely diluted with grain starch or has undergone insufficient extraction.

Can Lions Mane extract stimulate BDNF as well as NGF?

Some studies on erinacines, found in mycelium, show upregulation of brain derived neurotrophic factor (BDNF) in addition to NGF. A 2018 study by Zhang et al. in Behavioural Brain Research found that erinacine A enriched mycelium increased BDNF expression in the hippocampus of mice. This effect is specific to erinacines in the mycelium, not hericenones in the fruiting body. A quality dual source extract would theoretically capture both pathways.

Is Lions Mane extract safe to take daily?

The published clinical trials that produced positive outcomes used daily dosing over 8 to 16 weeks with no reported serious adverse events. No documented toxicity has been recorded in human studies at doses up to 3 g per day of dried mushroom equivalent. People with mushroom allergies or those taking medication affecting the nervous system should consult a qualified health practitioner before use.

What is the difference between Lions Mane powder and Lions Mane extract?

Raw powder is dried and ground mushroom material. Without extraction, most of the bioactive compounds remain locked inside the chitin cell wall, which the human gut cannot efficiently break down. An extract has undergone a process (hot water, alcohol, or both) that ruptures the cell wall and concentrates the active compounds. The bioavailability of hericenones and beta glucans is substantially higher in a properly produced extract than in raw powder.

Related Reading

• What Is Lions Mane Mushroom?
• What Is Lions Mane Mushroom Used For?
• Lions Mane Extract: What Should You Look For?
• Fruiting Body vs Mycelium: What Is the Difference?
• Inside Extraction Science
• What Batch Testing Should Reveal
• Why Whole Raw Material Matters
• What Is a Certificate of Analysis (COA) for Mushroom Supplements?
• How to Read a Mushroom Supplement COA: A Beginners Guide