Cordyceps, Maitake and Shiitake: the three mushrooms that aren't lion's mane

Lion's mane gets written about constantly. The other three mushrooms in a focus blend almost never do — which is odd, because two of them have been eaten as food for centuries and one of them has a research history stranger than any of the others.

CALMÉA Mushroom Oral Strips carry four mushrooms: Lion's Mane, Cordyceps, Maitake and Shiitake. We have already written about lion's mane, honestly and at length, including the parts where the evidence runs out. This is the article for the other three.

What they all have in common: beta-glucans

Before the individual profiles, the thing that connects them. All four are edible fungi, and the compound most often studied across all of them is a family of polysaccharides called beta-glucans — long chains of glucose molecules that make up part of the fungal cell wall.

Beta-glucans are the reason "mushroom supplement" is a category at all. They are also the reason the category is easy to fake: a cheap product can be mostly the grain the mushroom was grown on, which is starch rather than fungal cell wall. That distinction — fruiting body versus mycelium-on-grain — is the single most useful thing to understand before comparing two mushroom products by price.

Evidence note: that beta-glucans exist in these mushrooms and are structurally distinctive is well established. What they do in a human who eats a small daily amount of them is a separate question, and a much less settled one.

Cordyceps: the strangest one

Cordyceps is a genus of fungi with a genuinely unusual life cycle. The best-known species, Ophiocordyceps sinensis, grows on caterpillar larvae in high-altitude Himalayan and Tibetan grassland. Wild-collected, it is one of the most expensive biological materials on earth by weight.

Almost nothing sold as a supplement is that. Two other things are usually in the bottle:

• CS-4 — a strain isolated from wild O. sinensis in the 1980s and grown by fermentation in tanks. No caterpillars involved.
• Cordyceps militaris — a different, orange, cultivated species that is easier to grow and contains more of a compound called cordycepin.

Cordycepin is an adenosine analogue — structurally close to a molecule the body already uses for energy signalling — which is why cordyceps became associated with stamina in the first place.

What the research actually looks at

The human research on cordyceps is mostly about exercise tolerance, and it is small. The most-cited trials measured oxygen uptake and time to exhaustion in older adults over several weeks, at doses in the range of one to three grams a day of a fermented preparation. Some found modest improvements in measures of aerobic capacity; others found nothing distinguishable from placebo. Sample sizes are typically in the tens, not hundreds.

Evidence grade: some evidence for aerobic measures in older adults at gram-level doses. Early evidence or less for anything else.

Maitake: the one that is genuinely just food

Grifola frondosa grows in overlapping fans at the base of oak trees and has been foraged in Japan for a very long time. Its Japanese name is usually translated as "dancing mushroom." It is a good cooking mushroom — meaty, holds up to heat, doesn't go rubbery.

The research interest sits in a beta-glucan fraction that laboratory papers call D-fraction or MD-fraction. Most of that literature is cell-culture and animal work looking at immune signalling, and a smaller amount is early human work.

This is the honest position on maitake: it is a well-characterised, widely eaten mushroom whose isolated fractions have an active laboratory literature and a thin human one. The gap between "an isolated fraction did something measurable in a dish" and "a small daily amount in a supplement does something you would notice" is very wide, and nobody has closed it.

Evidence grade: early evidence.

Shiitake: the one with a real drug in the family

Lentinula edodes is the mushroom most people have already eaten. It is the second most cultivated mushroom in the world and has been grown deliberately for around a thousand years.

Shiitake carries the most interesting footnote in this group. A purified beta-glucan from it, lentinan, has been used in Japan since the 1980s as an adjunct in specific hospital settings. That fact gets recycled in marketing constantly, and it is worth being precise about why it does not transfer:

• Lentinan is purified, not whole mushroom.
• It is administered by injection, not swallowed.
• It is used under medical supervision for a defined purpose, not as a daily supplement.

An oral shiitake supplement and injected lentinan share a starting organism and very little else. Anyone who cites the second to sell you the first is hoping you won't check.

Separately, shiitake contains eritadenine, a compound not found in most other mushrooms, which has an animal-research literature around lipid metabolism. Human data on eating shiitake specifically is limited; one small controlled feeding study in healthy young adults reported changes in some immune markers over four weeks. Fifty-two people. One study.

Evidence grade: well established that shiitake is nutritionally distinctive and safe as food. Early evidence for oral supplementation effects.

What none of the three can do

None of these mushrooms treats anything. None of them is a substitute for sleep, and none of them will do much on a week where you are averaging five hours a night. If a page tells you a mushroom cures, heals, prevents or reverses something, that page is breaking the rules that govern how supplements may be described in the United States, and the claim is worth exactly as much as the rule-breaking suggests.

We hold ourselves to the same standard. You can read how we write about evidence and hold us to it.

How ours are built

Mushroom Oral Strips put all four — Lion's Mane, Cordyceps, Maitake and Shiitake — into a chocolate-flavoured strip that dissolves on the tongue. No water, no capsule to swallow. One a day, from a flat tin.

Two honest notes. First, a strip is a small format: for the ingredient list and the amounts, read the Supplement Facts panel on the label rather than trusting any description, including this one. Second, no caffeine is added — though the chocolate flavour carries a trace amount that occurs naturally in cacao, which we wrote about separately.

FAQ

Is cordyceps in supplements really grown on insects?

Almost never. Commercial cordyceps is either CS-4, a strain grown by fermentation, or Cordyceps militaris, a cultivated species. The caterpillar-grown wild material is rare and priced accordingly.

What is the difference between fruiting body and mycelium?

The fruiting body is the mushroom you would recognise. Mycelium is the root-like network, and in supplements it is usually grown on grain and dried with the grain still attached. Both are legitimate; they are not the same thing, and the labels do not always make the difference obvious.

Can I just cook with maitake and shiitake instead?

You can, and it is a good idea for reasons that have nothing to do with supplements — both are excellent food. Cooking them will not reproduce whatever a concentrated extract does, and no one can tell you precisely what that difference amounts to, because the studies to answer it have not been done.

Are these safe?

All three are widely eaten foods with long histories. That said, mushroom allergies exist, and if you take medication, are pregnant or nursing, or have a medical condition, speak with your doctor before adding any supplement.

How long before something happens?

The human trials that exist ran for weeks, not days. If a product promises you a same-afternoon change from a mushroom, treat the promise as marketing.

---

Content is for general educational purposes only and is not medical advice.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.