What Is Dual Extraction & Why It Matters for Mushroom Supplements

Walk through enough mushroom supplement brands and you'll start to see "dual extracted" used as a badge of quality. But what does it actually mean — and why does the extraction method matter so much?

Here's the straightforward version.

What Is Extraction?

Raw mushroom material — whether fresh, dried, or powdered — contains a wide range of active compounds locked inside tough cell walls made of chitin. The human digestive system can't break chitin down efficiently, which means simply grinding up a dried mushroom and putting it in a capsule delivers far less than it promises.

Extraction is the process of pulling those active compounds out of the cell walls and into a form the body can actually absorb. The method you use determines which compounds you get.

Water Extraction

Hot water extraction — essentially a long, controlled simmer — is effective at drawing out water-soluble compounds. The most important of these are beta-glucans, the polysaccharides that make functional mushrooms worth taking in the first place.

A hot-water extraction on its own produces something close to a very concentrated mushroom tea. It's the minimum standard for a quality supplement, and it's what traditional preparations — decoctions and broths — have always relied on.

Alcohol Extraction

Not all of the active compounds in functional mushrooms are water-soluble. Triterpenes — the compounds found in particular abundance in Reishi — require alcohol to extract. Without an alcohol step, these compounds remain locked in the material and are lost.

Alcohol extraction is typically done with food-grade ethanol. The mushroom material is soaked for an extended period, then the solvent is removed, leaving a concentrated extract rich in fat-soluble actives.

Why Dual Extraction?

A dual extraction process combines both steps — water and alcohol — to produce a full-spectrum extract that captures both the water-soluble beta-glucans and the alcohol-soluble triterpenes.

The result is a supplement that reflects the full complexity of the mushroom, not just one fraction of it. For mushrooms like Reishi, where triterpenes are a significant part of the therapeutic profile, dual extraction isn't optional — it's the only way to make a product that delivers what the research supports.

For mushrooms like Maitake, where beta-glucans are the primary active compounds, the water extraction step does the heavy lifting — but the alcohol step still contributes additional compounds that a water-only product would miss.

What to Look For on a Label

A product that uses dual extraction should say so clearly. Look for language like "dual extracted," "water and alcohol extracted," or "full-spectrum extract." If the label only says "extract" without specifying the method, it's worth asking.

Equally important: the beta-glucan percentage. A well-made dual extract from 100% fruiting body should test at 20–30% beta-glucans or higher. That number is the most honest signal of product quality available. If a brand doesn't publish it, ask for their certificate of analysis.

Our Standard

Every product in the Valley Botanicals range is dual extracted from 100% fruiting body — no mycelium, no grain filler. The process takes longer and costs more than single-step extraction, but it's the only way to make a product we'd be comfortable taking ourselves.

If you're looking for a place to start, our Maitake Drops are dual extracted and third-party tested — or explore the Complete Mushroom Drops Collection if you want to experience the full range.