Hericenones and erinacines explained

If you've spent any time researching Lion's Mane (Hericium erinaceus), you've almost certainly encountered the words hericenones and erinacines. They appear on product labels, in wellness articles, and across supplement marketing.

But what are they, exactly? Where do they come from? And why does it matter which extract you choose?

This article breaks down the compound science behind Lion's Mane, factually, transparently, and without the marketing noise that has come to define much of the functional mushroom category.

What Is Lion's Mane? A Brief Orientation

Hericium erinaceus is a culinary mushroom traditionally used in North America, Europe, and Asia. It has been used in East Asian traditional practices for centuries, particularly in China and Japan, where it was traditionally valued by Buddhist monks and incorporated into daily routines.

In modern wellness contexts, Lion's Mane is studied primarily for its bioactive compounds. Scientific interest has grown substantially since the 1990s, and research into its compound profile continues today.

What makes this mushroom scientifically interesting and what makes quality evaluation genuinely complex is that its most-studied compounds are not found in the same part of the organism.

Hericenones: Compounds of the Fruiting Body

What are hericenones?

Hericenones are a class of aromatic compounds, specifically, isoindolinone derivatives, isolated from the fruiting body of Hericium erinaceus. They were first characterised in the early 1990s by researchers, including Kawagishi et al., with hericenones C through H identified in initial studies. Additional variants (including hericenones K and P) have been identified in subsequent research.

Hericenones are alcohol-soluble compounds. This means they require ethanol or a similar solvent for effective extraction; hot-water extraction alone will not capture them in meaningful quantities.

Where are hericenones found?

Hericenones are found exclusively in the fruiting body of Lion's Mane. They are not produced in meaningful quantities in the mycelial phase of the organism.

This distinction matters. A fruiting body extract, properly produced using an ethanol extraction stage, should contain verifiable hericenone content. A product claiming hericenones from a mycelium-only or mycelium-on-grain source should be treated with scepticism.

How are hericenones tested?

Hericenone testing has historically been challenging due to the complexity of separating individual variants. However, analytical methods using HPLC (high-performance liquid chromatography) have advanced, and verified hericenone testing is now available from ISO-accredited laboratories.

At Mycogenius, we are starting to use hericenone content that is verified by third-party testing as part of our multi-marker quality framework. Results are published on our certificates of analysis, accessible via QR code on every product batch.

Erinacines: Compounds of the Mycelium

What are erinacines?

Erinacines are a structurally distinct group of cyathane diterpenoids identified in Hericium erinaceus. They were first characterised in 1994, with erinacines A through K described across a series of studies. Erinacines are also alcohol-soluble.

They are among the most researched groups of compounds in functional mushroom science and have been investigated extensively in the academic literature, particularly in Japan and Taiwan.

Where are erinacines found?

This is where the science becomes critically important for European consumers.

Erinacines are produced in the mycelial phase of Hericium erinaceus, specifically in liquid-grown mycelium (submerged liquid fermentation). They are not found in meaningful quantities in the mature fruiting body.

The EU regulatory context

In the European Union, Lion's Mane mycelium is classified as a novel food under EU Regulation 2015/2283. This regulatory position has had a defining impact on how Lion's Mane products are formulated and sold across EU member states.

In less regulated markets, some companies produce what is marketed as a "dual extract" by combining a water extract of the fruiting body with an alcohol extract of liquid-grown mycelium. This approach captures both hericenones and erinacines in a single product.

However, under EU regulation, this formulation approach is not widely permissible without novel food authorisation. As a result, most compliant EU products rely exclusively on fruiting body extracts and do not contain erinacines in meaningful quantities.

Understanding this regulatory context is essential before comparing European and non-European products, or before interpreting compound claims on labels.

At Mycogenius, we operate within EU regulatory frameworks. Our Lion's Mane extract is a whole-profile extract from the fruiting body. We do not make erinacine claims on a product where they cannot be independently verified.

A Compound Comparison at a Glance

The table below summarises the key differences between the primary compound groups found in Lion's Mane, and what they require to be properly extracted and verified.

Table: Primary compound groups in Hericium erinaceus, their biological source, solubility, and extraction requirements.

Why the Extraction Method Determines the Compound Profile

The compound profile of any Lion’s Mane extract is directly determined by the extraction method used. This is not a marketing distinction; it is a chemical one.

Hot water extraction

Hot water extraction is effective for water-soluble compounds, primarily beta-glucans and polysaccharides. A hot water extract will not capture hericenones or erinacines in meaningful quantities, as both groups are alcohol-soluble, except in the case of a whole-profile 1:1 extract. 

A product that uses only hot water extraction and claims significant hericenone content warrants scrutiny.

Ethanol extraction

Ethanol extraction captures alcohol-soluble compounds, including hericenones (from fruiting body) and erinacines (from liquid-grown mycelium). It is less effective at retaining water-soluble polysaccharides like beta-glucans.

Dual extraction (fruiting body)

A dual extraction of fruiting body material uses both hot water and ethanol stages to capture the full spectrum of water-soluble and alcohol-soluble compounds. This approach preserves beta-glucans, polyphenols, and hericenones within a single extract.

This is the approach Mycogenius uses for our Lion's Mane extract, whole-profile 1:1 fruiting body extraction in line with EU regulatory requirements.

The Problem With Ratio Marketing

Before discussing quality standards, it is worth addressing a widespread source of confusion in the supplement market: extraction ratios.

Ratios such as 8:1, 10:1, or 15:1 are frequently used on functional mushroom labels to imply potency or concentration. The logic presented is straightforward: a 10:1 extract requires 10 kg of raw material to produce 1 kg of extract; it must be stronger.

This reasoning is incomplete. An extraction ratio measures input weight relative to output weight. It does not measure the concentration of any specific bioactive compound. A high-ratio extract produced from poor-quality or diluted biomass remains a poor-quality extract.

At Mycogenius, we do not use ratio marketing. We verify compound content through ISO-accredited third-party analysis and publish the results. This is the standard we believe the entire category should be held to.

Why Beta-Glucans Alone Are Not a Complete Quality Marker

Beta-glucan percentage has become the most commonly cited quality indicator in the mushroom supplement category. It is a useful marker, but it is not sufficient on its own.

Several issues limit the reliability of beta-glucan testing as a standalone measure of quality:

• Beta-glucan percentages can be artificially elevated by yeast-derived polysaccharides or by external inputs unrelated to mushrooms.

• Standard analytical methods for beta-glucans do not distinguish between mushroom-derived and non-mushroom polysaccharides.

• A high beta-glucan reading does not confirm hericenone content, compound diversity, or extraction integrity.
  

A more robust quality framework includes:

• Verified beta-glucan testing using recognised analytical methods (such as the Megazyme method)

• Hericenone testing for fruiting body extracts — now available from specialist laboratories

• Polyphenol content as a supporting marker

• ISO-accredited laboratory accreditation for all testing

• Clear batch identification on all certificates of analysis

Single-marker testing creates blind spots. Multi-marker verification is the standard Mycogenius applies to every batch.

Understanding Mycelium-on-Grain (MOG) and Why It Matters

One further area of confusion in the Lion's Mane category is the distinction between different types of mycelium material.

Liquid-grown mycelium (submerged fermentation) is the form in which erinacines are produced. It involves cultivating mycelium in a liquid medium, enabling controlled production and extraction of compounds.

Mycelium-on-grain (MOG) is a different material entirely. MOG is produced by growing mycelium on a solid grain substrate (typically rice or oats). The resulting material contains both fungal mycelium and residual grain, which can significantly dilute the density of active compounds.

Products labelled as "mycelium" without specifying liquid-grown mycelium may be using MOG material. This is an important distinction, particularly when evaluating erinacine claims or comparing compound content between products.

How to Evaluate a Lion's Mane Extract: A Practical Framework

Given the complexity above, here is a straightforward framework for evaluating any Lion's Mane extract — whether from Mycogenius or any other producer.

Step 1: Identify the source material

Is the extract from fruiting body, liquid-grown mycelium, or mycelium-on-grain? Each produces a different compound profile. The label and COA should state this clearly.

Step 2: Check the extraction method

Hot water only, ethanol only, or dual extraction? This determines which compound classes are present. Cross-reference the extraction method with the compounds claimed.

Step 3: Verify compound testing

Is the beta-glucan content tested? Are hericenones tested (for fruiting body extracts)? Is the analytical method specified? Are these results from an ISO-accredited laboratory?

Step 4: Review the Certificate of Analysis

A credible COA should include batch identification, analytical method references, specific compound values, and the name and accreditation details of the testing laboratory. If this information is absent or vague, quality claims remain unverified.

Step 5: Disregard extraction ratios

Extraction ratios (8:1, 10:1, 15:1) are not independently verifiable in a finished product. Compound testing results, not ratio claims, are the measure of quality.

The Mycogenius Approach

Our Lion's Mane extract is produced from organically cultivated fruiting bodies using full-spectrum dual extraction, both hot water and ethanol stages, to preserve the complete compound profile of the fruiting body.

Because we operate in the EU, we work exclusively with fruiting body material in compliance with EU Novel Food regulations. We do not make erinacine claims on our fruiting body extract.

An ISO-accredited third-party laboratory tests every batch for:

• Beta-glucan content (Megazyme method)

• Hericenone content (HPLC analysis)

• Heavy metals and microbial safety

Results are published in full via QR code on every product. Not selected results. Every batch.

We do not use the extraction ratio marketing. We do not inflate quality claims. We publish our testing because quality should be demonstrable, not assumed.

Summary: What the Science Actually Tells Us

Lion's Mane is a scientifically interesting mushroom with a genuine research base. The compounds most studied in that research, hericenones and erinacines, come from different parts of the organism, require different extraction methods, and are subject to different regulatory frameworks depending on where you are in the world.

Quality evaluation in this category is not as simple as checking a beta-glucan percentage or a ratio of extraction. It requires understanding source material, extraction chemistry, and analytical verification.

The brands worth trusting are those willing to show their work.

For further reading, check out our The Mycogenius Lion's Mane Quality Standard

Frequently Asked Questions

Q: What are hericenones?

A: Hericenones are a class of aromatic compounds, specifically isoindolinone derivatives, isolated from the fruiting body of Hericium erinaceus. They were identified in the early 1990s and require ethanol-based extraction, as water alone cannot capture them effectively.

Q: Where are hericenones found?

A: Hericenones are found exclusively in the fruiting body of Lion's Mane. They do not develop in significant amounts during the mycelial growth phase. Products claiming hericenone content from mycelium-only sources warrant skepticism.

Q: What are erinacines?

A: Erinacines are a structurally distinct group of cyathane diterpenoids identified in Hericium erinaceus. Documented between 1994 onward, variants A through K have been characterized across multiple studies. Like hericenones, these compounds are alcohol-soluble.

Q: Where are erinacines found?

A: Erinacines are produced in the mycelial phase of Hericium erinaceus, specifically in liquid-grown mycelium (submerged liquid fermentation). They do not exist in meaningful quantities within mature fruiting bodies, making erinacine claims on fruiting body extracts questionable.

Disclaimer

This article is intended for educational purposes only. The information provided relates to compound identification, extraction science, and quality evaluation frameworks. It does not constitute medical advice. Functional mushroom supplements are not intended to diagnose, treat, cure, or prevent any disease or health condition. Individual experiences vary. If you have health concerns, consult a qualified healthcare professional.