Functional mushrooms in cocoa and coffee: just a trendy fad or does it really work
Coffee and cocoa with functional mushrooms: how does the fruiting body differ from mycelium grown on grain, what a study on lion's mane showed in humans, and how to read the label.
Coffee with lion's mane and cocoa with reishi have emerged from the niche and now sit on the shelf next to regular instant coffee. However, under the single name „mushroom drink” are products that differ in everything except the label: on one side, an extract from the fruiting body with a declared beta-glucan content, on the other, ground grain on which the mycelium grew. The difference is visible in the composition, not in the packaging, and the manufacturer is not obliged to show it. Additionally, there is a layer of promises that no one is allowed to place on the label because they have no approved basis. Below, we separate these three things: what can be verified before purchase, what has actually been demonstrated in studies involving humans, and where the area begins where nothing certain is known yet.
KEY INFORMATION
• Analysis of chaga supplements showed that products from mycelium grown on grain have a composition rich in starch, which is not present in the natural raw material (Windsor i in., Int J Mol Sci 2025).
• Beta-glucans have documented immunomodulatory effects, but in the EU, they do not have an approved health claim (van Steenwijk i in., Nutrients 2021).
• The most frequently cited study on lion's mane in humans involved 30 people and lasted 16 weeks; after discontinuation, the effect disappeared (Mori i in., Phytother Res 2009).
• On the label, look for the species name in Latin, the word „fruiting body”, and numbers next to beta-glucans and the mass of raw material per serving.
• The absence of this information does not prove poor quality, but it makes it impossible to assess the product.
Why might cheap mushroom products not work?
Because in many of them, there is little mushroom. A cheaper production method is growing mycelium on a grain substrate, most often on rice or oats. The mycelium overgrows the grain, after which the whole thing, along with the substrate, is dried and ground. What ends up in the sachet is therefore a mixture of mycelium and grain, and no one provides the proportions on the packaging.
The extent of this method's difference was shown by an analysis of chaga supplements published in 2025. The team compared raw material collected in nature with preparations containing products from fermented grain, using, among other things, beta-glucan labeling and an iodine-starch test. Preparations from fermented grain turned out to be rich in starch, while the true raw material contained no starch at all. Metabolomics and NMR spectra showed such a significant discrepancy in composition that the authors directly state that the products are presented inconsistently with their nature (Windsor i in., Int J Mol Sci 2025).
It should be honestly noted the scope of this work. Chaga was studied, not lion's mane, reishi, or other species, so the numbers from this analysis cannot be transferred to the entire market. The conclusion that can be transferred is methodological: the mere name of the species on the packaging says nothing about how much mushroom is inside. We discuss how individual species differ in their effects separately in the text about grzybach adaptogennych.
What are beta-glucans and what is really known about them?
They are polysaccharides that make up the cell wall of the mushroom, considered the main class of compounds responsible for its immunomodulatory action. They are not an invention of the supplement industry: they have been used in traditional Chinese medicine for centuries, and have been studied with modern immunological methods for several decades.
Review from the journal Nutrients summarizes this state and poses a question that advertisements do not ask: are mushroom beta-glucans more of a supplement or more of a medicine? The authors compare data on their efficacy and safety with the requirements that the European Food Safety Authority places on health claims regarding immunity and defense against pathogens. Their conclusion is cautious: beta-glucans may support and maintain health, and such an effect could be declared if approved (van Steenwijk i in., Nutrients 2021).
The last sentence is worth reading twice because it speaks in the subjunctive mood. As of today, there is no approved health claim for mushroom beta-glucans in the EU, so no manufacturer can legally state on the packaging that their powder boosts immunity. The declared content of beta-glucans is therefore information about the raw material, not a promise of effect. This is an important distinction when reading labels, as the percentage figure is often interpreted as proof of efficacy.
What to look for on the label of a mushroom drink?
Four pieces of information that are missing and prevent any assessment of the product. They are not a guarantee of quality, just a prerequisite: if they are absent, it is unclear what is being purchased, regardless of price and packaging appearance.
| Declared CBD content confirmed | Zapis dobry | A statement that says nothing | Why does it matter |
|---|---|---|---|
| Nazwa gatunkowa | Hericium erinaceus, Ganoderma lucidum, Inonotus obliquus | „lion’s mane blend”, „mushroom mix” | the common name may be shared by several species with different compositions |
| Part of the fungus | owocnik, ekstrakt z owocnika | brak informacji, „full spectrum”, „mycelium on grain” | mycelium grown on grain comes down with the substrate, the proportion of which no one declares |
| Beta-glucan content | liczba procentowa albo wynik analizy od laboratorium | „bogaty w polisacharydy”, „wysoka moc” | this is the only number that allows for comparison between two products |
| Raw material mass per serving | podana w miligramach albo gramach | „with the addition of mushrooms” | without mass, it is impossible to relate the serving to the amounts used in studies |
A note on the last line, as popular guides often miss the truth here. The circulating thresholds like „at least half a gram of extract per serving” do not come from any guidelines or meta-analysis. They are a generalization from various research protocols, which differ in species, form of raw material, and duration. The mass on the label allows for comparison with a specific study, not with an invented norm.
What did the study on lion's mane show in humans?
It showed an improvement that disappeared after discontinuation. The most frequently cited trial involving humans was published in 2009 in Phytotherapy Research. It included Japanese women and men aged 50 to 80 with a diagnosis of mild cognitive impairment, and the result was measured using a scale based on the revised Hasegawa Dementia Scale, abbreviated as HDS-R.
After a two-week preliminary observation, thirty individuals were randomly assigned to two groups of fifteen. The experimental group took four tablets of 250 milligrams each, containing 96 percent dried powder from lion's mane, three times a day for 16 weeks. In the eighth, twelfth, and sixteenth weeks, the cognitive function scores in this group were significantly higher than in the placebo group and increased with the duration of intake. Four weeks after the end of administration, the results significantly dropped. Laboratory tests showed no adverse effects (Mori i in., Phytother Res 2009).
Two things from this description contradict what sellers usually write. First, thirty individuals is a very small sample, and the authors formulate their conclusion cautiously, as a suggestion. Second, dried powder from the mushroom was administered, not a concentrated extract with a high ratio. The belief that only such an extract makes sense is therefore not supported by the work that it most often cites. We write more broadly about this species in the text about lion's mane.
Does hot water destroy the components of mushrooms?
In the case of beta-glucans, it is more beneficial than harmful. The traditional method of preparing medicinal mushrooms involves long boiling in water, as hot water is the solvent that extracts polysaccharides from the cell wall. Therefore, adding powder to a cup of hot coffee or cocoa is not a technological mistake.
Caution is needed when discussing other components. Guides provide specific temperature and time thresholds at which compounds characteristic of individual species supposedly break down, but we could not find any work from which these thresholds originated. Therefore, the honest answer is: for home brewing conditions, no one has systematically measured this.
The practical conclusion is therefore more modest than usually stated. Brewing powder in a hot drink is fine, long boiling makes sense with traditional decoctions, and pretending to precision where data is lacking only serves sales. If you are interested in how such a drink compares to regular coffee, the topic is expanded in the text about kawie z grzybami.
What does cocoa bring to such a drink?
More than its role as a flavor carrier suggests. Raw, unalkalized cocoa is a source of flavanols, magnesium, and theobromine, an alkaloid related to caffeine. Therefore, a cocoa drink has its own profile of action, independent of what we add to it.
This is also the reason why the assessment of „adaptogenic cocoa” can be difficult. If you feel calmer after an evening cup, the source of that feeling could just as well be the warm drink itself and the bedtime ritual as the added mushroom, and it is impossible to separate these factors without research. Advertisements attribute the entire effect to the most expensive ingredient, which is convenient but not a conclusion.
The homemade version has one advantage over ready-made mixes: you know what is inside. Heat 200 milliliters of plant milk without bringing it to a boil, and mix in two teaspoons of raw cocoa, a pinch of cinnamon, and a portion of mushroom powder measured according to the description on the packaging. You can sweeten it with honey. We have gathered more variations of such a drink in the text about kakao z adaptogenami.
Frequently Asked Questions
Do mushrooms in coffee and cocoa really work?
It depends on what is in the sachet. For lion's mane, there is a small placebo trial that showed improvement in cognitive function after 16 weeks in 30 people aged 50 to 80, but the effect disappeared after discontinuation. That's too little to speak of a certain effect, and too much to dismiss it as mere marketing.
What is the difference between the fruiting body and mycelium grown on grain?
The fruiting body is the part of the mushroom that we commonly refer to as the mushroom. Mycelium grown on grain is harvested together with the substrate, so the finished powder also contains grain. In the analysis of chaga supplements, products made from fermented grain turned out to be rich in starch, which is absent in the natural raw material.
Does the content of beta-glucans on the label guarantee anything?
It guarantees the ability to compare two products, not a health effect. In the EU, there is no approved health claim for mushroom beta-glucans, so the declared percentage is information about the raw material. A manufacturer who does not provide this number makes any comparison impossible.
Does hot water destroy the active ingredients in mushrooms?
Not likely for beta-glucans, as hot water is a traditional solvent used to extract them. For other compounds, no one has systematically measured this under home brewing conditions, so the temperature thresholds circulating in guides have no basis in sources.
How much mushroom should one serving of the drink contain?
There is no standard or guideline to refer to. The thresholds repeated in guides are generalizations from various research protocols that differ in species and form of the raw material. It makes sense to compare the mass from the label with a specific study, not with an invented number.
Is it worth making such a drink yourself?
It has one measurable advantage: you know how much and what went into the cup because you measure the ingredients yourself. A ready-made mix is more convenient, but you only know its composition to the extent that the manufacturer decided to describe it on the packaging.
You can find coffee and chocolate with adaptogens and gummies with mushroom extracts in the category adaptogens (stan na 16 sierpnia 2026).
The article is informational and educational in nature and does not replace consultation with a doctor. If you are pregnant, breastfeeding, taking medications, or have chronic conditions, consult the use of supplements or herbs with a specialist.
Author: Michał Waluk · Opublikowano: 2026-05-29 · Aktualizacja: 2026-08-16
