Functional mushrooms are one of the fastest growing categories among dietary supplements right now, and lion's mane leads the way. At the same time, you as a consumer meet big promises and very mixed quality. That makes it a good moment to sort out what actually holds up.
In this guide you will learn what lion's mane is, what the mushroom contains, what the research says and does not say, how it is used day to day, and what to look for when you choose a product.
What is lion's mane?
Lion's mane, Hericium erinaceus, grows on old deciduous trees and does not look like an ordinary mushroom. Instead of a cap and stem it forms a round, white cascade of spines that can bring to mind a lion's mane, a hedgehog or a pompom. In Japan it is called yamabushitake, and in the kitchen it is prized for its mild flavor with a hint of seafood.
One thing is worth knowing: in Sweden the wild mushroom is a protected species, so products are always made from cultivated mushrooms rather than wild ones. That is also the case everywhere else, since what is sold as food or as a supplement comes from cultivated mushroom, and that is exactly how it should be.
What does the mushroom contain?
As a food mushroom, lion's mane contributes protein, fiber and minerals, just like other mushrooms. What has made it something of a celebrity, though, is two other groups of substances.
The first is polysaccharides, above all beta glucans, which occur naturally in the mushroom's cell walls. The second is hericenones and erinacines, compounds that are essentially unique to this particular species. It is mainly these that have caught researchers' curiosity and made lion's mane one of the most studied species among functional mushrooms.
What does the research say about lion's mane?
The research is growing fast, but it is younger and thinner than the marketing sometimes suggests. Most of the studies have been done in test tubes or on animals, and human studies are so far few and small.
Within the EU there are currently no approved health claims for lion's mane, and the review of claims about mushrooms and other natural substances is still ongoing. Serious companies are therefore not allowed to promise specific effects, no matter how exciting the research picture looks.
Our advice is the same as for any talked about natural product: let your curiosity live, but stay skeptical of anyone promising miracles. Think of lion's mane as an interesting addition to a balanced lifestyle, not as a shortcut or a replacement for sleep, exercise and good food.
Why the mushroom is often combined with caffeine and theanine
In many products lion's mane appears together with other well known substances, often under the umbrella term nootropics. The word is used for substances people take with the goal of supporting focus and mental sharpness in everyday life.
Caffeine from green tea is the classic ingredient in such blends, well studied, well known and energizing. Theanine is an amino acid that occurs naturally in tea leaves and is often paired with caffeine, a duo that has become popular among students and office workers. In just a few years lion's mane has taken on the role of the modern, mushroom based component in that same company.
The trend shows clearly in the market: mushroom coffee, focus drinks and ready made blends where mushroom, tea and vitamins share a single serving.
How to use lion's mane day to day
How you use the mushroom depends on which form you choose and how much flavor you want.
| Form | How it is used | Good for you if you | Good to know |
|---|---|---|---|
| Cultivated fresh mushroom | Sliced and fried, eaten as food | enjoy cooking and trying new things | Sold in select stores, the wild mushroom is protected |
| Powder | Stirred into coffee, tea or a smoothie | want a simple daily routine | Mild flavor, start with a small amount |
| Extract in capsules | Swallowed with water | want to skip the flavor and the measuring | Check the beta glucan content on the label |
| Ready made blend | Taken as a premade serving | want to combine mushroom, tea and vitamins | Read the full ingredient list, quality varies |
How to choose good quality
The range of lion's mane products has grown explosively, and the differences between them are large. Three checks help you sort through it.
Start by looking at which part of the mushroom was used. Extract made from the fruiting body, meaning the mushroom itself, generally contains more of the interesting compounds than products based on mycelium, the mushroom's root like network, which is often grown on grain.
Next, check whether the beta glucan content is stated on the label. A maker that measures and reports its levels usually has good control over the whole chain. Finally, choose companies that are open about origin, cultivation and testing, and that describe their products without exaggerated promises.
Lion's mane in seed based supplements
For those who prefer a well thought out combination over loose jars, the mushroom is also available in ready made blends. In Rain's range you will find it in Rain Bryt, a natural, seed based nootropic formula made for focus and mental sharpness in everyday life.
In Bryt, lion's mane is combined with caffeine from green tea, theanine and chia seeds, the same nutrient rich seeds you may recognize from our guide to fibermaxxing. Vitamin B6 and B12 also contribute to the reduction of tiredness and fatigue, one of the few claims in this area that is actually approved within the EU.
Many people choose a ready made blend like this to avoid buying and dosing each ingredient separately, and to get a consistent amount every time.
Curious what a seed based focus routine can look like? Explore Rain's seed based supplements and see if Bryt fits your everyday life.
Good to know before you start
As food, cultivated lion's mane is uncomplicated for most people, but if you are allergic to mushrooms you should of course avoid it. With concentrated supplements, the same common sense applies as always: follow the dosage on the packaging and start carefully, since sensitive people can experience mild stomach effects.
Are you pregnant, breastfeeding or taking medication regularly? Check with a doctor or pharmacist before you start. And remember that no supplement replaces sleep, exercise, good food or treatment prescribed by your doctor.
Summary
Lion's mane is currently the most talked about of the functional mushrooms, with a long tradition in Asia and a fast growing research interest. The mushroom contains beta glucans, hericenones and erinacines, but no approved health claims exist yet within the EU, so keep your expectations realistic. Choose cultivated products with clearly stated content, ideally based on the fruiting body, and let the mushroom be part of a bigger picture that includes sleep, exercise and good food. Want to keep reading? You will find more articles in the health guide.