Almost every lion's mane specification in circulation quotes one of two numbers: "polysaccharides 50%" or "beta-glucans 30%". They sound interchangeable. They are not even measuring the same thing — and the gap between them is where most of the value in this category is won or lost. This article unpacks the marker chemistry, the two assay methods, and the specification language that separates a controlled material from a number on a page.
The Marker Family: What a Mushroom Is Made Of
Beta-glucans — the standardisation basis
The fungal cell wall is built substantially from beta-glucans: glucose polymers joined by beta-1,3 linkages with beta-1,6 branches. This branched 1,3/1,6 architecture is characteristic of fungi — it differs from the linear 1,3/1,4 beta-glucans of oats and barley — and it is the best-studied class of immune-active fungal polysaccharides. In a hot-water extract of Hericium erinaceus fruiting body, beta-glucan is the dominant genuine active fraction, and a serious commercial extract is standardised on it: our flagship grade runs not less than 30% w/w on a dry basis, with a 40% grade available.
Alpha-glucans — the anti-marker
Alpha-glucan is glucose joined by alpha linkages — which is to say, starch and glycogen. Fruiting bodies contain little of it. Grain contains a great deal. A lion's mane powder with high alpha-glucan is telling you its history: it grew on grain, and the grain came with it. This is why alpha-glucan deserves a limit on the specification (we hold NMT 5%) rather than being left unmeasured.
Hericenones and erinacines — the terpenoid fractions
The compounds most cited in the research literature on this species are not polysaccharides at all. Hericenones are aromatic compounds of the fruiting body; erinacines are diterpenoids concentrated in the mycelium. Both families are studied in nerve-growth-factor (NGF) pathway research — the research rationale behind lion's mane's cognitive positioning. Two practical consequences: a fruiting-body extract legitimately carries hericenones, not erinacines, so an erinacine claim on fruiting-body material is a red flag; and because these compounds are poorly water-soluble, capturing them takes a dual extraction — hot water for the glucans, then a hydroethanolic step for the terpenoids.
Two Methods, Two Very Different Numbers
Enzymatic assay — the method to insist on
The enzymatic method (the Megazyme mushroom beta-glucan kit is the industry reference, built on AOAC-validated chemistry) works by specificity: total glucan is enzymatically hydrolysed to glucose and measured; alpha-glucan is separately hydrolysed with amyloglucosidase and measured; and beta-glucan is the difference. Because the enzymes only cut their own linkage types, starch cannot masquerade as beta-glucan — the method reports it separately, as alpha-glucan. One assay therefore yields both the active figure and the adulteration readout.
Phenol-sulfuric UV — why "polysaccharides 50%" misleads
The phenol-sulfuric method dehydrates carbohydrates in hot sulfuric acid and reads the resulting colour by UV-Vis spectrophotometry. It is fast and cheap, and it responds to every carbohydrate in the sample: beta-glucan, yes, but equally starch from grain substrate, maltodextrin carrier, chitin fragments and free sugars. A myceliated-grain powder that is half starch will post a superb "polysaccharide" number. The figure is not fraudulent in itself — it is simply unable to distinguish the material you want from the material you are trying to avoid.
The key insight: on genuine fruiting-body extract, the UV polysaccharide figure and the enzymatic beta-glucan figure differ moderately. On grain-based or carrier-diluted material, they diverge wildly — 50% "polysaccharides" against single-digit beta-glucan is a real and common pattern. The divergence itself is diagnostic. Ask for both numbers and the alpha-glucan, and the material has nowhere to hide.
Reading the Declarations Side by Side
| Declaration | Method behind it | What it actually tells you |
|---|---|---|
| "Polysaccharides 50%" | UV (phenol-sulfuric) | Total carbohydrate — including starch and carriers. Alone, almost nothing. |
| "Beta-glucans 30%" | Enzymatic (Megazyme-type) | True fungal beta-glucan, specifically measured. The number to buy on. |
| "Alpha-glucans NMT 5%" | Enzymatic (Megazyme-type) | Starch content — the grain and carrier readout. The number that keeps the first honest. |
| "8:1 extract" | Ratio arithmetic | A manufacturing input ratio. Says nothing about active content. |
| "Hericenones present" | HPLC (qualitative) | The fruiting-body terpenoid fraction — meaningful on a dual extract, reported per batch. |
The extract-ratio point deserves emphasis because it migrates here from the herb trade: an "8:1" or "10:1" lion's mane says how much raw material went in, not what came out. Starting-material quality drives the result entirely — an 8:1 from myceliated grain is 8:1 concentrated starch. For any product carrying a defined-active claim, you need the enzymatic percentage.
Writing a Specification That Cannot Be Gamed
- Name the method. "Beta-glucans NLT 30.0% w/w on dry basis, by enzymatic assay (Megazyme-type)." Without the method clause, a UV polysaccharide figure is a defensible reading of your own specification.
- Set the alpha-glucan limit. NMT 5%. This single line excludes myceliated grain from your supply chain more effectively than any declaration.
- State the part. "Fruiting body only; no mycelium, no grain substrate" — on the CoA, batch by batch, not on a brochure.
- Require carriers declared. By name and percentage. A spray-dried water-soluble grade legitimately carries one; an undeclared carrier is dilution.
- State the dry basis. Beta-glucan powders are hygroscopic; without a dry-basis clause, moisture uptake quietly erodes your assay.
What About the Terpenoids?
Hericenone quantification is not yet harmonised across the industry — there is no pharmacopoeial monograph, and inter-lab comparability is poor — which is why we standardise on beta-glucans and report hericenones per batch on the dual-extract grade rather than promising a universal percentage. Treat any supplier quoting a precise hericenone standardisation with the same scrutiny you would apply to the method column generally: ask which reference standard, which method, which laboratory.
SV Botanica standardises fruiting-body lion's mane extract to beta-glucans NLT 30% by enzymatic assay with alpha-glucans NMT 5%, identity by HPTLC and ITS DNA sequencing of raw material available on request. See the lion's mane extract product specification for the complete parameter list, or the buyer's guide for how to approach the purchase.
Source Fruiting-Body Lion's Mane Extract from India
Beta-glucans NLT 30% by enzymatic assay · 40%, organic, water-soluble & dual-extract grades · no mycelium, no grain · CoA-backed · samples for qualified buyers