Lion's Mane Mushroom: What It Actually Does to Your Brain

A look at the evidence behind the mushroom's reputation for boosting nerve growth and easing mood.

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By the Ration Editorial Team · Reviewed against primary research · Updated July 14, 2026

Lion's mane (Hericium erinaceus) is a shaggy white mushroom that grows on hardwood trees.

It has a long history of use in East Asian cooking and traditional medicine.

Modern research has focused on its unique compounds, including hericenones and erinacines, which appear to interact with the nervous system^[1].

Lion's mane is best known for stimulating nerve growth factor (NGF), a protein that supports the growth and survival of neurons.

Early lab work found that extracts of the mushroom triggered NGF production in astrocytoma cells, a type of brain cell used to model neural signaling^[6].

More recent reviews describe lion's mane as neurotrophic and neuroprotective, meaning it may help nerve cells grow, adapt, and resist damage^[2].

Some of this effect appears linked to brain derived neurotrophic factor (BDNF), a protein closely tied to learning, memory, and mood regulation.

Across the studies in our database, lion's mane is consistently linked to increases in BDNF, with a strong evidence grade (A) based on six sources.

• ↑BDNFAHuman trials

  Research may raise BDNF · strong agreement · 6 studies

  View 5 studies on PubMed

  • Reduction of depression and anxiety by 4 weeks Hericium erinaceus intake (2010)
  • Therapeutic Potential of Hericium erinaceus for Depressive Disorder (2019)
  • Neurotrophic and Neuroprotective Effects of Hericium erinaceus (2023)
  • Lion's Mane Mushroom (Hericium erinaceus): A Neuroprotective Fungus with Antioxidant, Anti-Inflammatory, and Antimicrobial Potential-A Narrative Review (2025)
  • Hericium erinaceus mycelium ameliorate anxiety induced by continuous sleep disturbance in vivo (2021)

A narrative review summarizing lion's mane research highlights its antioxidant, anti-inflammatory, and antimicrobial properties alongside its neuroprotective effects^[1].

Animal research found that lion's mane mycelium reduced anxiety like behavior in mice exposed to continuous sleep disturbance, a model used to study stress and anxiety^[3].

A separate review examined its therapeutic potential for depressive disorder, pointing to its influence on neurotrophic pathways as a plausible mechanism^[4].

The most cited human evidence comes from a small randomized controlled trial in which women took lion's mane cookies daily for four weeks.

That trial reported reduced depression and anxiety symptoms compared to placebo, though the sample size was small and the population specific^[5].

Taken together, the research paints a consistent picture in animal and cell models, with early but encouraging signals in humans.

• Fresh lion's mane mushroom, cooked and eaten like other culinary mushrooms
• Dried lion's mane, often rehydrated for cooking
• Powdered extracts, sold as capsules or loose powder
• Tinctures made from mycelium or fruiting body extracts
• Functional coffees or teas blended with lion's mane powder

There is no official dosing standard for lion's mane.

Human studies, including the trial on mood symptoms, have generally used daily doses in the range of a few grams of dried mushroom powder for several weeks^[5].

Supplement products vary widely in concentration depending on whether they use the fruiting body, the mycelium, or an extract standardized to erinacines or hericenones.

Because extraction methods differ so much between products, the effective dose in one supplement may not match another.

Lion's mane is generally well tolerated in the studies available, including the trial testing it for mood^[5].

Reported side effects tend to be mild and may include digestive discomfort.

People with mushroom allergies should be cautious, and anyone on medications affecting the nervous system or blood clotting may want to discuss use with a healthcare provider before adding it.

Long term safety data in humans remains limited, since most trials run for only a few weeks to a few months.

• People interested in cognitive support and neuroprotection, based on preclinical neurotrophic research^[2]
• People exploring natural options for mild anxiety or low mood, given early human and animal data^[3][4][5]
• People who enjoy culinary mushrooms and want to include lion's mane as a whole food rather than a supplement
• Researchers and biohackers tracking BDNF and NGF as biomarkers of brain health

Lion's mane has some of the more consistent preclinical evidence among popular 'brain mushrooms,' particularly for raising BDNF and stimulating NGF activity^[1][2][6].

Human trials for mood and anxiety are promising but still few and small^[5].

It appears safe for most people in the short term, but it should be viewed as a supportive, not proven, tool for brain health.