The Longevity Vitamin You Can Only Get From Mushrooms

There is a molecule your body cannot make, cannot store easily, and quietly runs low on after the age of 60. You can only get it by eating it, and by a wide margin the richest source on the planet is mushrooms. Its name is ergothioneine, and a run of recent studies has scientists calling it a “longevity vitamin.” For anyone thinking about how they want their mind to age, it is one of the most encouraging stories in nutrition right now.

The newest and largest piece of that story followed 1,344 older adults for more than a decade. The people carrying the most ergothioneine in their blood were far less likely to develop dementia. Here is what the research actually shows, and why mushroom lovers have every reason to feel good about it.

Meet ergothioneine, the molecule you can only eat

Ergothioneine is a powerful antioxidant made by fungi. Humans cannot synthesize it, yet our bodies clearly value it. We have a dedicated transporter, a gene called SLC22A4, whose only known job is to pull ergothioneine out of food and carry it into our cells, concentrating it in the places that take the most oxidative wear. The brain, the eyes, the liver and the blood are all rich in it. Biologists do not build a special delivery truck for a molecule that does not matter.

That combination, a nutrient we cannot produce but actively hoard, led Penn State researcher Robert Beelman and colleagues to propose that ergothioneine is a “longevity vitamin,” a compound that is not immediately essential for survival but strongly tied to healthy aging over the long run (Journal of Nutritional Science, 2020). Their other finding was simple and a little pointed. Countries whose diets are naturally higher in mushrooms tend to have lower rates of neurodegenerative disease. Mushrooms are, essentially, the only meaningful way to get it.

What the newest study found

The standout is the Hisayama Study, a Japanese research project that has tracked the health of an entire town for decades. Researchers measured serum ergothioneine in 1,344 residents aged 65 and older, all free of dementia at the start, then followed them for a median of 11.2 years (Psychiatry and Clinical Neurosciences, 2025). Over that time, 273 people developed dementia.

When they compared the participants with the highest ergothioneine levels to those with the lowest, the gap was striking. After adjusting for a long list of lifestyle and dietary factors, the highest group had a 44% lower risk of all-cause dementia, a 39% lower risk of Alzheimer’s disease, and a 57% lower risk of non-Alzheimer’s dementia. The trend held steadily across every step up in ergothioneine, which is exactly the pattern researchers hope to see.

The part that surprised everyone

Here is the finding that made this study travel. The researchers already knew that eating vegetables is good for the brain. So they checked whether ergothioneine was just riding along with a healthy, veggie-heavy diet. It was not. When they split people into those who ate a lot of vegetables and those who ate few, higher ergothioneine was linked to lower dementia risk in both groups.

In other words, the mushroom antioxidant appeared to carry its own weight, on top of the usual healthy-eating advice. That is a rare and welcome thing in nutrition research, where most single nutrients turn out to be stand-ins for a good diet overall. Ergothioneine looked like it was doing something in its own right.

Why it matters more after 60

There is a reason this research speaks so directly to anyone over 50. Blood levels of ergothioneine are known to fall as we age, with the decline picking up after about 60 (Proceedings of the Nutrition Society, 2025). So the exact moment the body starts running lower on it is the moment brain health becomes a bigger part of the conversation.

A five-year study out of Singapore put a fine point on it. Following 470 older adults attending memory clinics, researchers found that those with the lowest plasma ergothioneine had poorer memory and thinking at the start, and declined faster over time across memory, attention, language and executive function (Antioxidants, 2022). Low ergothioneine kept turning up alongside faster decline. Keeping it topped up looks like a genuinely good idea, and the way to do that is delightfully simple. Eat more mushrooms.

Where Microgenix fits

We are, proudly, a mushroom company, so a story like this is our favorite kind of news. We will also be straight with you, the way we always are. These are observational studies, which show a strong and consistent link rather than final proof, and the clinical trials on ergothioneine supplements are still early. What is not in doubt is that mushrooms belong in your life, and that a routine built around them is a lovely thing to have after 50.

That is really what we make. Our Clarity capsules draw on Lion’s Mane, Reishi and Chaga, three functional mushrooms, in a gentle daily microdose for focus and mood. If you would rather keep things fully sober of psilocybin, Support is our nootropic mushroom blend with no psilocybin at all, built to sit in your morning like a vitamin. Both are a simple way to make mushrooms a daily habit instead of an occasional side dish. New to all of this? Our microdosing guide is a calm, honest place to start.

Frequently asked questions

What is ergothioneine and where do I get it?

It is an antioxidant made only by fungi. Humans cannot produce it, so it has to come from food, and mushrooms are by far the richest source. Oyster, shiitake, maitake and king oyster mushrooms are especially high in it, and even common button mushrooms contribute.

Does ergothioneine really lower dementia risk?

Large studies show a strong association. In the 2025 Hisayama Study of 1,344 older adults, those with the highest blood ergothioneine had a 44% lower risk of all-cause dementia over 11 years. These are observational findings, so they show a powerful link rather than proof of cause, but the pattern has now repeated across several independent studies.

Do I still need to eat my vegetables?

Yes, absolutely, and nobody in this research suggests otherwise. What made the latest study notable is that higher ergothioneine was linked to lower dementia risk whether people ate a lot of vegetables or a little. Think of mushrooms as a powerful addition to a healthy plate, not a replacement for one.

Why does this matter more as I get older?

Blood ergothioneine tends to fall after about 60, right when brain health becomes a bigger priority. Low levels have been linked to faster cognitive decline in older adults, so keeping mushrooms in your regular diet is a simple, enjoyable way to stay topped up.

The simplest good habit there is

Most brain-health advice asks a lot of you. This one asks almost nothing. Add more mushrooms to your week, and if you would like them woven into a daily routine rather than left to chance, that is exactly what we build. It is a small, pleasant habit with a very long view, and the science keeps getting more encouraging. Curious where to begin? Take our two minute dose quiz and we will point you to the right fit.

This article is for general education and is not medical advice. Ergothioneine research is promising but still developing, and no food or supplement prevents or treats dementia. If you have questions about memory, cognition or your diet, especially if you take medication, please talk with your doctor.