Lion’s Mane Mushroom: Does It Really Boost Brainpower — or Just Make You Feel Better?

Bottom line: A small study hints that Lion’s Mane might help young adults think faster — but the real story is more complicated.

Somewhere on the internet right now, someone is swishing a chewed-up apple seed in their mouth, convinced it’s reading their DNA. The same logic has come for mushrooms — and untangling why it’s wrong leads somewhere far stranger than the myth.

Lion’s Mane mushroom, with its shaggy white tendrils, has been called a “brain booster” for decades. It’s sold in smoothie bowls, tinctures, and capsules, with promises of sharper focus, less stress, and better mood. But what does the science actually say? A new pilot study, published in Europe PMC, offers a glimpse — but also raises more questions than answers.

A Small Sample, Big Claims

The study, conducted in 2023, involved 41 healthy adults aged 18 to 45. Participants were randomly assigned to either take 1.8 grams of Lion’s Mane mushroom daily for 28 days or a placebo. The researchers were interested in both the acute (immediate) and chronic (long-term) effects of the supplement on cognitive performance, stress, and mood.

What they found was modest but intriguing. After just one dose of Lion’s Mane, participants performed faster on the Stroop task — a widely used cognitive test that measures attention and processing speed. The improvement was statistically significant, with a p-value of 0.005, which is considered strong evidence in scientific research. However, the effect size was small, and it’s unclear whether this translates to any meaningful real-world benefit.

Over the 28-day period, the group taking Lion’s Mane showed a trend toward reduced subjective stress, with a p-value of 0.051 — close to, but not quite, statistical significance. This suggests that while the mushroom may help with stress, the evidence is still tentative.

The Science Behind the Fungus

Lion’s Mane mushroom, scientifically known as Hericium erinaceus, is unique among fungi for its high concentration of bioactive compounds. These include erinacines and hericenones — compounds that have been shown in animal studies to stimulate the production of nerve growth factor (NGF), a protein critical for the growth, maintenance, and survival of neurons.

In the brain, NGF is involved in synaptic plasticity — the brain’s ability to form and reorganize connections — and has been linked to improved memory and learning. This has led to speculation that Lion’s Mane might support cognitive function in humans, especially in older adults or those with neurodegenerative conditions like Alzheimer’s disease.

But the new study focused on young, healthy adults. This is a key difference. Most previous research on Lion’s Mane has been in older adults or those with cognitive impairments. The question is: does the mushroom help people who already have sharp minds — or only those who need a boost?

The Limitations: Small Sample, Big Hopes

Despite the promising results, the study’s limitations are significant. With only 41 participants, the sample size is too small to draw definitive conclusions. The results could be due to chance, or they might not be generalizable to the broader population.

Another issue is the lack of long-term data. The study only lasted 28 days, which is not enough time to see if the effects of Lion’s Mane are sustained or if there are any potential long-term risks. Also, the study relied on self-reported measures of stress, which can be subjective and prone to bias.

Moreover, the researchers found “null and limited negative findings,” which means that in some areas — like mood, memory, or other cognitive tests — there was no significant difference between the Lion’s Mane group and the placebo group. This suggests that the benefits, if any, are very specific and may not be as broad as some supplements claim.

What’s Next: More Research, More Clarity

The study is a pilot — a stepping stone for future research. The authors acknowledge that larger, more rigorous trials are needed to confirm these findings. They also suggest that future studies should explore whether different doses or formulations of Lion’s Mane might yield better results.

In the meantime, the mushroom remains a popular supplement — not just in health circles, but in the wellness world. It’s sold in high-end cafes, added to smoothies, and even promoted on social media as a “nootropic” (a substance that enhances cognitive function). But the science is still in its infancy.

Frequently Asked Questions

Q: Can Lion’s Mane really improve brain function?
A: There is some evidence from animal studies that Lion’s Mane may support nerve growth and brain health. However, the evidence in humans is limited and mostly inconclusive. More research is needed.

Q: Is there any scientific support for Lion’s Mane as a supplement?
A: Yes, but it’s limited. A few small studies suggest that it may improve mood and reduce stress in older adults, but the effects in younger, healthy individuals are still unclear.

Q: Are there any side effects of taking Lion’s Mane?
A: In general, Lion’s Mane is considered safe. However, as with any supplement, it can cause gastrointestinal discomfort in some people. Long-term safety data is still lacking.

Q: Should I take Lion’s Mane for brain health?
A: If you’re interested in trying it, it’s probably worth a try — but don’t expect miracles. There’s not enough evidence yet to recommend it as a standalone supplement for cognitive enhancement.

Q: Can Lion’s Mane help with anxiety or depression?
A: The evidence is mixed. Some studies suggest that it may help with mood, but others show no effect. More research is needed to understand its role in mental health.

Sources

• ¶The Acute and Chronic Effects of Lion’s Mane Mushroom Supplementation on Cognitive Function, Stress and Mood in Young Adults: A Double-Blind, Parallel Groups, Pilot Study. Europe PMC, 2023. DOI: 10.3390/nu15224842.
• ¶The effects of twenty-one nutrients and phytonutrients on cognitive function: A narrative review. Europe PMC.
• ¶A review of the effects of mushrooms on mood and neurocognitive health across the lifespan. Neuroscience & Biobehavioral Reviews.
• ¶Benefits, side effects, and uses of Hericium erinaceus as a supplement: a systematic review. Frontiers in Nutrition.

Educational Disclaimer

This article is for informational and educational purposes only. It is not medical advice, mental health advice, diagnosis, treatment guidance, or a recommendation to use any substance, supplement, therapy, or protocol.

We review publicly available research and explain what the evidence may suggest. Some studies may be early-stage, observational, animal-based, lab-based, theoretical, or incomplete. Always consult a qualified professional before making health-related decisions.

Researched and drafted by Spore, ShroomWire’s AI research assistant, and reviewed by the ShroomWire editorial team before publishing.