From the Maiden's Notebook
Lion's Mane Fruiting Body vs. Mycelium
Not all Lion's Mane is the same. Here's what those two words on the label mean — and why they change what's actually in the bag.
If you've shopped for Lion's Mane supplements or mushroom coffee, you've probably seen the words fruiting body and mycelium. They sound technical, but the difference has a big effect on what you're paying for. Here's a plain-English guide.
What is the fruiting body?
The fruiting body is the mushroom itself — the part you can see, pick and cook. For Lion's Mane, it's the white, shaggy, cascading mushroom that gives the species its name, and it's the part people have eaten for centuries.
Lion's Mane fruiting bodies naturally contain compounds such as beta-glucans and hericenones, which are among the compounds researchers study most.
What is mycelium?
Mycelium is the root-like network a mushroom grows from. It's a real and interesting part of the organism with its own compounds (Lion's Mane mycelium is where erinacines are mainly found).
The catch is in how most commercial mycelium is grown. Many mycelium products are cultivated on grain such as oats or rice, and the mycelium can't be fully separated from the grain it grows on. The final powder is often a mix of mycelium and leftover grain — which can mean a lot of starch and much less mushroom per gram than the label suggests.
At a glance
| Fruiting body | Mycelium on grain | |
|---|---|---|
| What it is | The mushroom itself | Root network plus the grain it grew on |
| Starch & filler | Low | Often substantial |
| Beta-glucans | Naturally present | Often lower per gram |
| Tradition | Long history as food | Mostly a modern production method |
| Cost to grow | Higher — takes time and space | Lower and faster |
Why do so many brands use mycelium?
Mostly, it's cheaper and faster. Growing mushroom fruiting bodies takes space, time and careful farming, while mycelium on grain can be produced quickly in large volumes. That's not automatically bad — but you deserve to know which one you're buying, and how much actual mushroom is in it.
How to read a Lion's Mane label
- Look for "fruiting body" spelled out. If the label just says "Lion's Mane" or "mushroom blend," it may be mycelium.
- Watch for "myceliated grain," "mycelium biomass" or "full spectrum." These usually mean mycelium grown on grain.
- Check the dose. A "proprietary blend" can hide how much Lion's Mane you actually get. Look for a stated amount in milligrams.
- Ask where it's grown. Country of origin affects how transparent the supply chain is.
- Look for third-party testing. Mushrooms absorb a lot from their environment, so independent testing matters.
How much Lion's Mane is in mushroom coffee?
This is where the difference really shows. When we compared the four leading mushroom coffee brands, here's how the Lion's Mane per serving stacked up:
Ours is 100% fruiting body, and we print the number right on the label.
Our approach
Our Lion's Mane is grown in open-air high tunnels high in the Appalachian Mountains. We use 100% fruiting body — never mycelium, grain, starch or fillers — and every product is third-party lab tested.
- Lion's Mane Mushroom Coffee — 1,700+ mg per serving
- Lion's Mane Capsules — 500 mg per serving
- The Morning Stack — coffee and capsules together
- Lion's Mane Powder and Whole Dried Lion's Mane for the kitchen
Curious about the research? Visit our Lion's Mane studies page or our FAQs.
These statements have not been evaluated by the Food and Drug Administration. Our products are not intended to diagnose, treat, cure, or prevent any disease. Consult a healthcare professional before use.