Lion's Mane, Reishi, Maitake… Adaptogenic mushrooms have made their way into coffees, lattes and wellness aisles, often alongside some very bold promises. Yet behind the trend lies a much older story: mushrooms used for centuries in Asian traditions and now studied with curiosity by researchers. So what do we actually mean when we talk about an adaptogenic mushroom or a functional mushroom?

In this complete guide, we take an honest look at the topic: the definitions, the main mushrooms and their traditional uses, what research is exploring (and what it cannot yet claim), the different ways to bring them into your daily routine in coffee, matcha or a latte, the quality criteria worth knowing and the precautions to follow.

Adaptogenic mushroom, functional mushroom: what are we talking about?

The term adaptogen was coined in the Soviet Union in the 1940s and 1950s by researchers interested in plants such as eleuthero and rhodiola. It referred to substances believed to help the body adapt to the demands of its environment. It is a concept from traditional herbalism, not a scientific or regulatory category: in Europe, the word “adaptogen” does not correspond to any effect recognised by health authorities.

The term functional mushroom is broader and more neutral. It refers to mushrooms eaten not only for their flavour, but also for the compounds they naturally contain:

• Beta-glucans — polysaccharides found in mushroom cell walls, and among the most studied compounds
• Triterpenes — bitter-tasting molecules that are characteristic of Reishi
• Species-specific compounds — for example, the hericenones and erinacines in Lion's Mane

In practice, the two expressions are often used interchangeably. The key thing to remember is that these are traditional foods and ingredients, to be enjoyed as part of a ritual, not remedies.

The main adaptogenic mushrooms and their traditional uses

There are dozens of so-called functional mushrooms. Here are the ones you will come across most often, starting with the three that make up the AdapCoffee range.

Lion's Mane (Hericium erinaceus)

With its long white strands cascading down like a waterfall, Lion's Mane is one of the most recognisable mushrooms. In Japan it is called yamabushitake, a nod to the mountain hermits whose robes resembled its shape. Long eaten as a culinary mushroom in China and Japan, it is traditionally associated with mental clarity. It is also the mushroom most studied today for its unique compounds. We have dedicated a full article to it: Lion's Mane: everything you need to know. You'll find it in Clarity Cup, Matcha Clarity and Glow Latte.

Reishi (Ganoderma lucidum)

Known as lingzhi in China, Reishi holds a special place in Asian tradition, where it is nicknamed the “mushroom of longevity”. It appears in ancient texts of Chinese medicine and in art as a symbol of long life and harmony. Too tough and too bitter to cook with, it has always been consumed as a decoction or a powder. It features in all three AdapCoffee drinks.

Maitake (Grifola frondosa)

Its Japanese name means “dancing mushroom”: legend has it that those who found it in the forest danced with joy, so prized was it. Highly valued in the kitchen for its texture and woody flavour, it is traditionally associated with overall vitality. It is part of Clarity Cup and Matcha Clarity.

Cordyceps, Chaga, Shiitake: other names you'll come across

Traditionally, Cordyceps comes from the high plateaus of the Himalayas, where it was associated with endurance; most products today use a cultivated species, Cordyceps militaris. Chaga grows on birch trees in northern forests and is drunk as an infusion in Russia and Scandinavia. Shiitake, finally, is above all a culinary mushroom and one of the most widely eaten in the world. These three mushrooms are not part of our blends, but they are useful to know when reading labels.

What research is exploring (with caution)

Scientific interest in functional mushrooms is real and growing. But it is important to distinguish between what is being explored and what has been demonstrated.

• Lion's Mane — its hericenones and erinacines are studied in the lab for their interactions with nerve cells. A few human trials exist, but on small groups and over short periods
• Reishi — its triterpenes and polysaccharides are the subject of extensive work, mostly on cells and in animals. Available reviews highlight the lack of robust human trials
• Maitake — its beta-glucans are studied mainly in the lab, with still very little human data

In short: these are interesting leads and preliminary studies, not proof. Lab results don't automatically translate to a cup drunk in the morning, and the amounts studied vary widely from one study to the next. That is why we talk about traditional uses and rituals, and never about guaranteed effects.

What is certain, on the other hand, is the pleasure of a hot, indulgent and comforting drink, enjoyed in a quiet moment, replacing a less interesting habit. If you are going through a period when energy is running low, our article November Fatigue: 6 Natural Ways to Get Your Energy Back also covers the basics that matter most: sleep, light, diet and movement.

How to enjoy adaptogenic mushrooms: coffee, matcha or latte

Traditionally, mushrooms were consumed as a long decoction or as a powder. Today, the simplest way to bring them into your daily routine is to pair them with a drink you already enjoy. Their often earthy taste goes very well with coffee, matcha or indulgent notes.

In coffee: Clarity Cup

Clarity Cup combines arabica coffee with Lion's Mane, Reishi and Maitake extracts, plus chicory and acacia fibre. One heaped spoonful (about 4 g) in 250 to 300 ml of hot or cold water: it's ready in seconds and can also be enjoyed iced. Ideal if you don't want to give up the taste of coffee in the morning. To understand the thinking behind this recipe, read why we created Clarity Cup.

In matcha: Matcha Clarity

Matcha Clarity brings together ceremonial matcha, naturally rich in L-theanine, the three mushrooms from the range, acacia fibre and a touch of coconut milk for a creamy texture. It's the option for anyone who prefers tea to coffee. Same serving: about 4 g in your cup, stirred with a spoon or a frother.

As an indulgent latte: Glow Latte

Glow Latte is all about comfort: arabica coffee, Lion's Mane and Reishi extracts, chicory, marine collagen, coconut milk powder, hibiscus and natural vanilla flavouring. A comforting latte, perfect for a winter afternoon break (bearing in mind that it contains coffee).

A few tips to make the most of it

• Consistency over quantity — one cup a day, built into your routine, is plenty
• The right time — in the morning or early afternoon, since all three drinks contain coffee or matcha
• A screen-free ritual — take a few minutes to truly savour it; that's often where wellbeing happens
• No added sugar — a plant-based milk or a pinch of cinnamon is enough to soften your cup

High quality standards, from mushroom to cup

Not all mushroom products are created equal. Three criteria make the difference:

• An extract rather than a simple powder — mushroom compounds are locked inside a rigid cell wall. Extraction concentrates them, which a dried mushroom powder does not do
• A stated extraction ratio — it expresses the amount of mushroom used to obtain 1 g of extract. In Glow Latte, the Lion's Mane extract is 30:1 and the Reishi extract 14:1: in other words, it takes about 30 g of Lion's Mane to obtain 1 g of extract
• A transparent ingredient list — the Latin name of each mushroom, the full list of ingredients and no unnecessary additives

AdapCoffee recipes are developed by our nutrition experts using concentrated mushroom extracts rich in beta-glucans. Clarity Cup and Matcha Clarity are 100% natural, vegan, free from added flavourings and gluten-free. Glow Latte, which contains marine collagen sourced from fish, is not vegan.

Precautions

Functional mushrooms are traditional ingredients, but they are not suitable for everyone:

• Pregnancy and breastfeeding — due to insufficient data, our mushroom drinks are not recommended for pregnant or breastfeeding women, or for children under 12
• Medical treatment — some mushrooms such as Reishi or Maitake are not recommended alongside anticoagulants, diabetes medication or immunosuppressants. If you are on medication, or before surgery, ask your doctor or pharmacist for advice
• Allergies — avoid these products if you are allergic to mushrooms. Glow Latte contains fish collagen: it is not suitable for people with a fish allergy
• Caffeine sensitivity — Clarity Cup and Glow Latte contain coffee, Matcha Clarity contains matcha. Avoid them late in the day if you sleep lightly, and don't combine them with other significant sources of caffeine
• Sensitive digestion — start with half a serving for the first few days, while you get used to the chicory and acacia fibre

FAQ

What is an adaptogenic mushroom?

It is a mushroom that tradition associates with the body's ability to adapt to everyday demands. The term comes from herbalism and has no regulatory standing in Europe. It is also called a functional mushroom, consumed for its natural compounds such as beta-glucans.

Do adaptogenic mushrooms taste like mushrooms?

Very little in a drink. The extracts have a slightly earthy note that coffee, matcha, chicory or vanilla balance out very well. Most people stop noticing it after a few cups.

Can you drink mushroom coffee every day?

Yes, for a healthy adult, one cup a day fits easily into a routine. Just keep in mind the caffeine it contains and follow the precautions above. Experiences vary from person to person.

What is the difference between Clarity Cup, Matcha Clarity and Glow Latte?

Clarity Cup is a mushroom coffee (Lion's Mane, Reishi, Maitake), Matcha Clarity replaces the coffee with ceremonial matcha, and Glow Latte is an indulgent version with Lion's Mane, Reishi, marine collagen, coconut milk and vanilla.

Are adaptogenic mushrooms safe?

Consumed in usual amounts by a healthy adult, mushrooms such as Lion's Mane, Reishi or Maitake are generally well tolerated. Caution is advised during pregnancy or breastfeeding, and in case of allergy or medical treatment.

Further reading

• Lion's Mane: The Mushroom for Mental Clarity and Focus
• Why Your Regular Coffee Makes You Tired (and How Clarity Cup Changes Things)
• November Fatigue: 6 Natural Ways to Get Your Energy Back
• 7 Nutrition Tips to Get Through Winter Feeling Good