One food reduces your risk of depression by 25%, cuts cancer risk, feeds your brain a compound no other food can make, and most people eat it once a month at best.
It’s not a berry. It’s not a leafy green. It’s the organism that gets a bad rep but has been the foundation of most life on the planet for 1.3 billion years.
Mushrooms.
And you’re probably not eating nearly enough of them.
The Molecule Only Mushrooms Make
You’ve heard of antioxidants. You’ve probably never heard of ergothioneine. It’s an amino acid so important that your body evolved a dedicated transporter protein just to absorb it. Yes, your cells built a specific doorway for this molecule. Your body doesn’t do that for vitamin C. It doesn’t do that for resveratrol. But it does it for ergothioneine.
However, your body can’t make it. And the only meaningful dietary source is mushrooms.
Ergothioneine accumulates in your highest-stress tissues – your brain, your eyes, your liver, your bone marrow. So the tissues doing the hardest work get the most protection. And as you age, your levels drop. Countries where mushroom consumption is highest have consistently lower rates of neurodegenerative disease. That’s not a coincidence.
A meta-analysis across over 600,000 participants found that people who ate mushrooms regularly had a significantly lower risk of cancer, depression, and all-cause mortality. The depression finding alone (roughly 25% reduced risk) came from a Penn State study that controlled for the usual confounders. Something real is happening here.
The Fibre You’re Not Thinking About
Everyone’s talking about fibre for gut health. Good, they should be. But most people think of oats and beans. Mushrooms are a fibre source that almost nobody optimises for, and the type of fibre they carry (beta-glucans) does something special.
Beta-glucans are prebiotic. They feed the specific gut bacteria that produce butyrate, a short-chain fatty acid that is arguably the single most important molecule for gut barrier integrity. Butyrate keeps your intestinal lining tight. When butyrate production drops, you get permeability. When you get permeability, you get systemic inflammation. When you get systemic inflammation, you get… well, the modern disease landscape.
Mushrooms also happen to be absurdly low in calories, high in water content, and remarkably satiating. Studies on appetite regulation have found that swapping meat for mushrooms in meals resulted in the same reported fullness with significantly fewer calories consumed. The short chain fatty acids fed by mushroom beta-glucans also increase GLP-1 naturally. So if you’re interested in body composition, mushrooms are an underutilised tool.
Functional Mushrooms
Beyond your standard button, cremini, and shiitake, there’s a class of mushrooms that have been used in traditional medicine for centuries and are now being validated by modern science. These are your functional mushrooms, and each one has a surprisingly specific superpower.
Lion’s Mane stimulates the production of Nerve Growth Factor (NGF) – a protein that literally promotes the growth and maintenance of neurons. We’re talking about published research showing that compounds in Lion’s Mane (hericenones and erinacines) cross the blood-brain barrier and encourage neurogenesis. Your brain can grow new cells. This mushroom appears to help it do so.
Cordyceps contains a nucleoside analogue called cordycepin that mimics adenosine – a molecule at the heart of your cellular energy system (it’s the “A” in ATP). Research on cordycepin shows effects on oxygen utilisation, metabolic efficiency, and even blood sugar regulation. There’s a reason it keeps showing up in sports performance and metabolic health research.
Reishi has been called the “mushroom of immortality” in Chinese medicine for two thousand years. Modern research focuses on its triterpenes and polysaccharides, which appear to modulate the immune system rather than simply “boost” it. Essentially meaning it calms overactive immune responses while supporting underactive ones. This bidirectional activity is rare in nature and is why reishi is also studied in the context of stress adaptation and sleep quality.
Turkey Tail is one of the most researched mushrooms in oncology. Its polysaccharide-K (PSK) is actually an approved adjunct cancer therapy in Japan. The mechanism is also immune modulation. Specifically, activation of natural killer cells and T-cells. Your immune system is your first line of defence against aberrant cell growth, and turkey tail appears to sharpen it.
Chaga is loaded with antioxidants (one of the highest ORAC scores ever recorded in a food) and has demonstrated anti-inflammatory properties in preliminary research. It’s traditionally consumed as a tea and is being studied for its effects on oxidative stress and gut health.
Each of these mushrooms does something different, and that’s precisely the point. This isn’t a single-mechanism story. This is a kingdom of organisms offering a toolkit for human health that we’re only beginning to map.
Mushrooms As a Model
Here’s where I want to go beyond nutrition, because mushrooms genuinely changed how I think.
Fungi are not plants. They’re not animals. They’re their own kingdom, and they operate on principles that challenge our default assumptions about how living systems work.
Consider the mycelial network: a single organism can span thousands of acres underground, connecting trees across a forest, redistributing nutrients from areas of surplus to areas of need. Trees that are dying send their carbon through fungal networks to neighbouring trees. Older trees subsidise younger ones. The forest is not just a collection of individual organisms. It’s a wildly complex, competitive and collaborative network – much like a city or an economy – and fungi are the infrastructure.
This goes beyond a metaphor. It’s measurable biology. And it offers a genuinely different model for thinking about systems, whether biological (like our own brain and bodies), economic, social or technological.
Mushrooms are also nature’s great decomposers. They break down dead matter and turn it into bioavailable nutrients. They are how forests regenerate. Without fungi, dead plant matter would just pile up. The carbon cycle as we know it would collapse.
Mycoremediation (using fungi to clean contaminated environments) is a real and expanding field. Certain mushroom species can break down petroleum products, filter heavy metals from water, charcoal, and even decompose plastics. Paul Stamets’ work has shown oyster mushrooms degrading diesel-soaked soil into a garden within weeks. The potential for environmental restoration is enormous.
The lesson fungi offer is one of decentralisation and regeneration. They have no central command or hierarchy, just a network that senses conditions, adapts, and distributes resources based on supply and demand. If you’re thinking about how to build resilient systems, fungi are possibly the best teacher on the planet.
Breaking Paradigms
And then there’s the compound that’s reshaping psychiatry.
Psilocybin, the psychoactive molecule in “magic mushrooms”, has gone from Schedule I stigma to breakthrough therapy designation at the FDA in less than a decade. The clinical results are hard to overstate.
Johns Hopkins, Imperial College London, NYU, and others have published trial data showing that one or two guided psilocybin sessions can produce dramatic, lasting reductions in treatment-resistant depression, end-of-life anxiety, and addiction. We’re talking about single sessions producing effects that persist for months, sometimes years. There’s no daily pill, no prescription, and no toxic side effects. It’s a fundamentally different treatment paradigm.
The mechanism appears to involve a temporary increase in neural connectivity. Your brain’s default mode network (the part responsible for your sense of self, your habitual thought loops, your ego) quiets down, and regions that don’t normally communicate start talking to each other. The rigid patterns that characterise depression, anxiety, and addiction are temporarily dissolved, and the brain gets a window to rewire.
But psilocybin’s health benefits go way beyond the brain. A study published in npj Aging in 2025 provided the first experimental evidence that psilocybin may be a potent anti-ageing agent. Researchers at Emory University and Baylor College of Medicine treated human cells with psilocin (psilocybin’s active metabolite) and found that it extended cellular lifespan by 29% at a standard dose and by 57% at a higher dose.
The treated cells showed delayed onset of senescence, preserved telomere length, reduced oxidative stress, and increased expression of SIRT1, a protein critically involved in regulating cellular ageing and longevity.
Then they tested it in living animals. Aged mice teceived monthly psilocybin treatments for 10 months. The result was 80% of the psilocybin-treated mice survived, compared to just 50% in the control group. The treated mice also showed visible improvements in fur quality and hair regrowth. This was a statistically significant survival advantage from a molecule we’ve been told for decades has no medical value.
The implications are staggering. We already knew psilocybin could rewire the brain. Now there’s evidence it may slow the biological clock at a cellular level. The researchers describe psilocybin as a potentially “disruptive” geroprotective agent.
The regulatory landscape is shifting fast. Australia has already legalised psilocybin therapy. Several US states and cities have decriminalised or are actively building therapeutic frameworks. The research pipeline is accelerating.
So What Do You Actually Do With This?
Start simple. Eat more mushrooms. Seriously. I aim for at least one serving every day. Experiment with a mix of culinary varieties (shiitake, maitake, oyster, cremini) to give you the broadest spectrum of beta-glucans, ergothioneine, and micronutrients.
If you want to go deeper, explore functional mushroom extracts (check the links in the menu at the top of this page). Look for products that use fruiting body (not mycelium on grain) and that provide transparency on beta-glucan content.
And, beyond the practical, study fungi. Read Merlin Sheldrake’s Entangled Life. Watch Paul Stamets’ talks. Pay attention to the mycoremediation research. Sign up to my newsletter. Let the way fungi operate reshape how you think about networks, resilience, and regeneration.
The mushroom kingdom has been doing more with less, longer than any other complex life on Earth. It built the soil that allowed plants to colonise land. It connects forests. It decomposes the dead so new life can emerge. It produces molecules that grow our neurons, regulate our immune systems, and may hold keys to treating the mental and physical health crisis of our time.
Mushrooms aren’t just another trend. They’re a technology that’s been running for over a billion years.
It’s time to start mushroom-maxxing.
