Dual Extraction: Why Water and Alcohol Both Matter

THE BOXED-IN MYCELIUM INDEX

Field Guide No. 003 • Mushroom Extraction

Introduction

Mushroom extraction is often described as though it were a single process. In reality, different compounds found in mushrooms have different chemical properties, and no single solvent necessarily extracts everything equally well.

Two of the most commonly used solvents are water and alcohol. Water is effective at extracting many water-soluble constituents, while alcohol can extract other compounds that are less soluble in water.

A dual extraction uses both. The purpose isn't to make a tincture sound more sophisticated—it is to use complementary extraction methods to capture a broader range of constituents from the mushroom material.

In this Field Guide, we'll look at what water and alcohol actually do during extraction, why extraction methods vary among mushroom species, and what “dual extracted” really tells you about the product in the bottle.

What Does Extraction Actually Mean?

Extraction is the process of using a solvent to move soluble compounds out of mushroom material and into a liquid.

Mushrooms contain a complex mixture of compounds, and those compounds do not all dissolve equally well in the same solvent. Some are readily soluble in water, while others are more soluble in alcohol or mixtures of alcohol and water.

This is why the choice of solvent matters. Extraction isn't simply about soaking mushrooms in liquid—it is about selecting conditions that help transfer the desired constituents from the mushroom material into the finished extract.

The mushroom species, the compounds of interest, the solvent concentration, temperature, extraction time, and ratio of mushroom material to solvent can all influence the final extract.

What Does Hot Water Extract?

Hot-water extraction is commonly used with mushrooms because many important fungal constituents are water-soluble.

Among the best-known are polysaccharides, including various beta-glucans found in fungal cell walls. Hot water can help solubilize and release some of these larger carbohydrate molecules from the mushroom material.

Temperature matters because mushroom cell walls are structurally complex. Heating the material in water can improve the movement of soluble compounds into the extraction liquid compared with simply soaking dried mushrooms in cold water.

But hot water does not extract every mushroom constituent equally well. Some compounds have limited water solubility, which is one reason alcohol may be used as a second extraction solvent.

What Does Alcohol Extract?

Alcohol can dissolve certain mushroom constituents that are less soluble in water. The compounds recovered depend heavily on the mushroom species and the concentration of alcohol used.

A well-known example is reishi (Ganoderma species), whose fruiting bodies contain triterpenoid compounds often referred to as ganoderic acids and related compounds. Many of these are more readily extracted with alcohol than with water alone.

Alcohol can also extract various sterols, phenolic compounds, and other relatively less water-soluble constituents found in mushrooms.

This does not mean alcohol is universally “better” than water. The two solvents have different strengths, which is precisely why combining them can be useful.

So What Is a Dual Extraction?

A dual extraction uses both water and alcohol to extract mushroom material, taking advantage of the different solvent properties of each.

One common approach is to perform a hot-water extraction and an alcohol extraction separately, then combine the resulting liquids. Other producers may use the solvents sequentially on the same mushroom material.

The exact method can vary. Alcohol concentration, water temperature, extraction time, mushroom-to-solvent ratio, and the order of extraction can all affect the finished product.

This is important because the words “dual extracted” do not describe a single standardized process. They tell you that both water and alcohol were used, but they do not automatically tell you how efficiently the extraction was performed or what concentration of mushroom-derived constituents ended up in the bottle.

Does Every Mushroom Need Dual Extraction?

Not necessarily. The most appropriate extraction method depends on the mushroom species, the material being extracted, and which constituents the producer intends to recover.

Mushrooms do not all have identical chemistry. A method that makes sense for reishi, with its mixture of water-soluble polysaccharides and less water-soluble triterpenoids, may not be necessary or optimal for every other species.

This is why “dual extracted” should not automatically be interpreted as “better.” A good extraction process should be designed around the chemistry of the particular mushroom rather than a marketing phrase applied uniformly to every product.

The more useful questions are:

• What mushroom was extracted?

• What solvents were used?

• Why were they chosen?

• And what does the finished product actually contain?

What Should You Look for in a Dual-Extracted Tincture?

The phrase “dual extracted” is useful, but it shouldn't be the only information you rely on when evaluating a mushroom tincture.

Look for a producer that clearly explains:

• Which mushroom species and fungal material were used

• Whether water, alcohol, or both were used for extraction

• Why that extraction method was chosen

• The alcohol content of the finished tincture

• The amount or concentration of mushroom material represented in the finished product

• Whether meaningful testing or analytical information is available

Transparency matters more than impressive terminology. A producer should be able to explain what went into the extraction, how it was processed, and what ultimately ended up in the bottle.

Field Notes

Dual extraction is a useful technique, but the phrase itself isn't a guarantee of quality.

What matters is whether the extraction method makes sense for the particular mushroom being used and whether the producer can clearly explain the process.

At Boxed-In, we believe extraction should follow the mushroom—not the marketing. Different species have different chemistry, and the method should be chosen accordingly.

Ultimately, the goal isn't to use the most impressive-sounding extraction method. It's to understand the material you're working with and make thoughtful decisions about how to extract it.

Continue Exploring the Mycelium Index

Extraction is only one part of understanding what goes into a mushroom tincture.

The Boxed-In Mycelium Index is an expanding collection of Field Guides exploring mushroom cultivation, fungal biology, extraction methods, ingredients, and the decisions that shape the finished product.

Continue through the Field Guides to follow the process from mushroom to bottle.

Selected References

Yang, M., Qin, X., & Liu, X. (2025). A review of polysaccharides from Ganoderma lucidum: Preparation methods, structural characteristics, bioactivities, structure-activity relationships and potential applications. International Journal of Biological Macromolecules, 303, 140645.

Li, Y., Zhu, Z., Yao, W., & Chen, R. (2012). Study progress on triterpenoids from Ganoderma lucidum. Zhongguo Zhong Yao Za Zhi, 37(2), 165–171.

Lu, J., et al. (2023). Recent advances in the preparation, structure, and biological activities of β-glucan from Ganodermaspecies: A review. Foods, 12(15), 2975.

Kozarski, M., et al. (2023). The mushroom glucans: Molecules of high biological and medicinal importance. Foods, 12(5), 1009.