Lion's Mane for Calm & Stress: Research Review (2026)

Written by Tao Wu, Founder Published May 13, 2026 19 min read Editorial Policyadaptogensanxietybrain healthlion's manesupplements

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The honest answer: the direct human evidence for lion's mane and anxiety is one small positive trial — promising but far from conclusive — and if anxiety is your main concern, ashwagandha is the better-supported choice. The single trial that measured anxiety as a primary outcome (Nagano 2010) found 2 g/day of lion's mane significantly lowered anxiety and depression scores in 30 menopausal women over 4 weeks. A 2023 pilot (Docherty) saw only a near-significant stress trend (p = 0.051), and a 2025 single-dose study found no acute mood effect — expected, because lion's mane is not a traditional anxiolytic. It doesn't directly modulate GABA or serotonin the way SSRIs or benzodiazepines do; it works indirectly through nerve growth factor and BDNF, supporting hippocampal neuroplasticity over weeks (Lai 2013; Menon 2025 review). By contrast, ashwagandha has 5+ RCTs with 300+ participants showing significant anxiety-score improvements and a ~27.9% cortisol reduction (Chandrasekhar 2012). So lion's mane makes most sense when anxiety co-occurs with brain fog or cognitive sluggishness — as a complement to, not a replacement for, stronger options. If you try it, use a fruiting-body extract at 1,000–3,000 mg/day (the dose both positive trials used) and give it 4–8 weeks; there's no immediate calming effect. No trial has reported anxiety as a side effect, though a minority anecdotally feel jittery — possibly NGF-related activation or a reaction to mycelium-on-grain products. Stop if anxiety worsens, and consult your prescriber before combining it with psychiatric medication.

Lion's mane keeps showing up in "natural anxiety remedy" lists, but the evidence behind those recommendations is thinner than most articles admit. One small trial directly measured anxiety outcomes — and it was positive. A handful of others measured stress or mood as secondary endpoints. That's the entire human evidence base for this specific claim.

This article tells you exactly what that evidence is, what it means in practical terms, and where the gaps are large enough to drive a truck through. If you're considering lion's mane for anxiety, you deserve the full picture — not just the optimistic half.

Key Takeaways

One small RCT (Nagano et al., 2010) found that lion's mane significantly reduced anxiety and depression scores in 30 menopausal women over 4 weeks. This is the only trial that directly measured anxiety as a primary outcome.
A 2023 pilot study (Docherty et al.) found a trend toward reduced subjective stress after 28 days of supplementation in healthy young adults, but the result did not reach statistical significance (p = 0.051).
Lion's mane is not an anxiolytic in the traditional sense. It doesn't directly modulate GABA or serotonin like prescription anti-anxiety medications. Its mechanism centers on nerve growth factor (NGF) and neuroplasticity.
A Northumbria University trial (NCT06406946) is currently recruiting stressed/anxious Gen Z women to test lion's mane for mood and wellbeing — results expected in the coming years.
If anxiety is your primary concern and you want the strongest evidence-backed natural option, ashwagandha has a substantially deeper evidence base for stress and anxiety specifically.

Quick Facts: Lion's Mane and Anxiety

Direct anxiety evidence: 1 small RCT (30 women, 4 weeks, positive result). Plus 1 pilot study with a stress trend.

Mechanism: Stimulates NGF and BDNF. Does not directly target GABA or serotonin pathways.

Compare to ashwagandha: Ashwagandha has 5+ RCTs showing cortisol reduction of ~28% and significant anxiety score improvements. Lion's mane has 1.

Best for: People whose anxiety co-occurs with brain fog, poor focus, or cognitive sluggishness — where lion's mane's cognitive benefits may provide complementary value.

Typical dose: 1,000–3,000 mg/day of fruiting body extract.

What the Research Actually Shows

The human evidence for lion's mane and anxiety is limited to a handful of studies — and only one directly measured anxiety as a primary outcome. Here's each study, what it found, and what it didn't.

The Nagano 2010 Trial: The Best Direct Evidence

A randomized controlled trial published in Biomedical Research tested lion's mane in 30 menopausal women over 4 weeks. Participants ate cookies containing 2g of lion's mane powder daily or placebo cookies. At the end of the trial, the lion's mane group showed significantly lower scores on two validated psychological scales — the Centre for Epidemiologic Studies Depression Scale (CES-D) and the Indefinite Complaints Index (ICI) — compared to placebo. The ICI specifically captures anxiety, irritability, and feelings of frustration (Nagano et al., 2010).

This is a real result from a real RCT. But it has clear limitations: 30 participants is small. The population was exclusively menopausal women — whose hormonal state may amplify mood symptoms in ways that aren't generalizable. The duration was only 4 weeks. And the dose was delivered in cookies rather than standardized capsules, making it harder to compare to modern supplements.

The Docherty 2023 Pilot: A Trend, Not Proof

Dr. Sarah Docherty's 2023 pilot study at Northumbria University's Brain, Performance and Nutrition Research Centre tested 1.8g/day of lion's mane in 41 healthy young adults (aged 18–45). While the primary focus was cognitive performance, subjective stress was also measured. After 28 days, the lion's mane group showed a trend toward reduced stress (p = 0.051) — just barely missing the conventional threshold for statistical significance (Docherty et al., 2023, Nutrients).

A p-value of 0.051 is frustrating: it suggests something may be happening, but it doesn't meet the bar for confident claims. The authors themselves described this as "a promising avenue of interest" — not a conclusion. With a larger sample size, this trend might have reached significance. Or it might have evaporated. More data is needed.

The Surendran 2025 Acute Study: No Mood Benefit

A 2025 acute-dose study by Surendran et al. gave healthy young adults a single 3g dose of lion's mane extract and measured cognition and mood at 90 minutes post-consumption. The result: no significant improvement in composite mood measures compared to placebo. Individual task-level improvements were observed for some cognitive measures, but mood and anxiety were unaffected by a single dose (Frontiers in Nutrition).

This isn't surprising. If lion's mane works through NGF-mediated neuroplasticity, a single dose wouldn't be expected to produce mood changes — that's a process that takes weeks of consistent use. But it does rule out the idea that lion's mane provides immediate calming effects.

Ongoing Research: The Gen Z Anxiety Trial

Northumbria University is currently running a new trial (NCT06406946) specifically testing lion's mane — and a lion's mane/reishi blend — on wellbeing in stressed and anxious Gen Z women. The trial uses the GAD-7 (Generalized Anxiety Disorder scale) and HADS (Hospital Anxiety and Depression Scale) as primary outcomes. It's the first trial designed to directly test lion's mane in an anxiety-relevant population with validated anxiety instruments. Results are expected in the coming years.

How Lion's Mane Might Affect Anxiety (Mechanism)

The extract is not an anxiolytic — a substance that directly reduces anxiety through neurotransmitter modulation. Understanding this distinction is essential for setting realistic expectations.

Prescription anti-anxiety medications (SSRIs, benzodiazepines, buspirone) work by directly modulating serotonin, GABA, or other neurotransmitter systems involved in the anxiety response. Lion's mane does not work this way.

Instead, lion's mane contains hericenones and erinacines that stimulate nerve growth factor (NGF) production. NGF supports neuronal growth, repair, and plasticity — particularly in the hippocampus, a brain region involved in emotional regulation and stress processing (Lai et al., 2013, International Journal of Medicinal Mushrooms). The 2025 systematic review led by Anukriti Menon at Mohammed Bin Rashid University of Medicine and Health Sciences confirmed that lion's mane enhances BDNF production and promotes hippocampal neurogenesis across multiple studies. However, the review also noted that most clinical trials had small sample sizes and short durations, and that larger, well-designed clinical trials are needed before definitive conclusions can be drawn (Menon et al., 2025, Frontiers in Nutrition).

Anxiety reduction through lion's mane would be indirect: healthier neural infrastructure in the hippocampus → better stress processing and emotional regulation → reduced anxiety over time. This is fundamentally different from taking an SSRI or a benzodiazepine, which alter neurotransmitter levels directly and produce effects within hours to weeks.

Some researchers have also noted anti-inflammatory properties of lion's mane — relevant because neuroinflammation is increasingly linked to mood disorders. But this mechanism remains preclinical and hasn't been demonstrated in human anxiety specifically. For related reading on how ashwagandha affects cortisol and stress, see our detailed guide.

Lion's Mane vs Ashwagandha for Anxiety: An Honest Comparison

If anxiety is your primary concern, you should know how lion's mane stacks up against ashwagandha — because the evidence gap is substantial.

Factor	Lion's Mane	Ashwagandha (KSM-66)
RCTs testing anxiety directly	1 (Nagano 2010, n=30)	5+ (including Chandrasekhar 2012, Salve 2019)
Cortisol reduction data	None	27.9% reduction (Chandrasekhar 2012)
Anxiety scale improvements	Significant on ICI (1 trial)	Significant on PSS, GAD, DASS (multiple trials)
Primary mechanism	NGF/neuroplasticity (indirect)	HPA axis modulation (direct cortisol reduction)
Onset time for mood effects	4+ weeks (no acute benefit)	2–4 weeks
Best for	Anxiety + brain fog/cognitive issues	Anxiety + stress + sleep issues

The verdict: For anxiety specifically, ashwagandha has a meaningfully stronger evidence base. If your anxiety co-occurs with significant brain fog, poor focus, or cognitive sluggishness, lion's mane may add complementary value through its cognitive-support mechanism. Many people use both — lion's mane in the morning for focus, ashwagandha in the evening for stress and sleep. For more on this combination, see our guide on taking lion's mane and ashwagandha together.

What Most "Lion's Mane Anxiety" Articles Get Wrong

After reviewing the top 10 ranking articles for this keyword, we found three recurring problems:

1. They conflate "stress" with "anxiety." Several top-ranking articles cite the Docherty 2023 stress trend (p = 0.051) as evidence that lion's mane reduces anxiety. Subjective stress and clinical anxiety are different constructs measured by different instruments. A near-significant stress reduction in healthy college students does not equal anxiety relief in people with generalized anxiety. Only the Nagano 2010 trial used anxiety-specific measures.

2. They bury the sample sizes. Saying "studies show lion's mane reduces anxiety" without mentioning that the entire human evidence base consists of 30 menopausal women eating mushroom cookies is misleading by omission. Context about study size and population matters — especially when the reader may be deciding whether to try a supplement for a real problem.

3. They don't compare to ashwagandha. Nearly every "lion's mane for anxiety" article treats the topic in isolation. None of the top 5 results mention that ashwagandha — available at the same price point and widely accessible — has 5+ RCTs for anxiety with 300+ total participants. Failing to mention the stronger-evidence alternative doesn't serve the reader.

Original Analysis: Evidence Quality by Anxiety-Related Outcome

We scored each anxiety-relevant outcome against three quality criteria: number of trials, total participants, and whether the result reached statistical significance. This analysis isn't available in any competing article:

Outcome	Trials	Total n	Significant?	Evidence Grade
Anxiety scores (ICI)	1 (Nagano 2010)	30	Yes (p<0.05)	Weak-Moderate
Depression scores (CES-D)	1 (Nagano 2010)	30	Yes (p<0.05)	Weak-Moderate
Subjective stress	1 (Docherty 2023)	41	No (p=0.051)	Weak
Acute mood improvement	1 (Surendran 2025)	18	No	None
Cortisol reduction	0	—	—	No data
Sleep quality	0	—	—	No data

Bottom line: Only one outcome — anxiety scores in menopausal women — has a statistically significant positive result from a controlled trial. Everything else is either trending, null, or untested. Contrast this with ashwagandha, where cortisol reduction, stress scores, anxiety scores, AND sleep quality all have significant results across multiple independent trials.

Can Lion's Mane Cause Anxiety?

About 20 people per month search "can lion's mane cause anxiety" — and it's a legitimate question. Some users on Reddit and supplement forums report feeling jittery, overstimulated, or experiencing increased anxiety after starting lion's mane. What's going on?

No clinical trial has reported anxiety as a side effect of lion's mane. The 2025 Menon et al. systematic review examined adverse events across all included studies and reported that side effects were rarely documented across most studies — with the most common being mild GI discomfort and headache. Anxiety was not listed (Menon et al., 2025).

However, anecdotal reports aren't nothing. Possible explanations include: individual sensitivity to NGF stimulation (which can feel "activating" in some people), reactions to mycelium-on-grain products that contain compounds not present in pure fruiting body extracts, or coincidental timing with other anxiety triggers. If you experience increased anxiety after starting lion's mane, stop taking it and reassess. For the full safety profile, see This compound side effects.

Should You Try Lion's Mane for Anxiety?

Based on the current evidence, here's a practical decision framework:

It may be reasonable if: Your anxiety is mild to moderate and accompanied by brain fog or cognitive issues. You've already tried or are currently using stronger-evidence options (therapy, ashwagandha, magnesium glycinate) and want to add something for cognitive support. You understand that the anxiety-specific evidence is limited to one small trial. You're willing to commit to 4–8 weeks of consistent daily use before evaluating.

It's probably not the best starting point if: Anxiety is your sole or dominant concern and you want the strongest available evidence — ashwagandha is a better first choice. You have a diagnosed anxiety disorder managed with medication — discuss any supplement changes with your prescribing physician. You expect immediate calming effects — lion's mane has no acute anxiolytic activity.

For dosing guidance, see our lion's mane dosage article. For timing, most people take lion's mane in the morning since it can be mildly stimulating — see best time to take lion's mane.

How Supplement Quality Affects Results

If the bioactive compounds responsible for NGF stimulation — hericenones and erinacines — aren't present in sufficient concentration, you're unlikely to get any benefit, anxiety-related or otherwise.

Both positive trials used powdered fruiting body. No clinical trial showing positive results has used mycelium-on-grain products, which contain lower concentrations of hericenones and significant starch filler. When choosing a product, look for fruiting body extract with third-party testing. See our fruiting body vs mycelium guide for what to look for on the label.

Brand	Source	Dose/Serving	Cost/Serving	Note
Host Defense	Mycelium on grain	1,000 mg	~$0.40	High starch content; lower hericenone concentration than fruiting body.
Real Mushrooms	Fruiting body	500 mg	~$0.50	>25% beta-glucan verified. Need 2 capsules for 1g dose.
Nootropics Depot	Fruiting body 8:1	500 mg	~$0.33	High-concentration extract. Third-party COAs published.
YourHealthier	Fruiting body	500 mg	~$0.33	Fruiting body, third-party tested, no fillers. See product.

For broader context on mushroom supplements, see our guides on mushroom coffee, best mushroom supplements, and our 10-mushroom complex benefits article.

Who Should Be Cautious

People on psychiatric medications. No interaction between lion's mane and SSRIs, SNRIs, or benzodiazepines has been formally studied. While no adverse interaction has been reported, the combination hasn't been tested in clinical trials. Consult your prescribing physician before adding lion's mane to any psychiatric medication regimen.

People with mushroom allergies. Avoid lion's mane entirely. Allergic reactions, while rare, have been documented.

People who experience increased anxiety from lion's mane. Some individuals report a stimulating effect. If lion's mane increases your anxiety rather than reducing it, discontinue use.

"The NGF stimulation data from lion's mane is the most interesting thing happening in natural cognitive support right now. The Mori 2009 trial showed real, measurable cognitive improvement that reversed when supplementation stopped."

— Karen D. Sullivan, PhD, ABPP, Board-Certified Neuropsychologist

"From a nutritional psychiatry perspective, lion's mane is one of the few supplements where the preclinical NGF data and the human cognitive trial data actually point in the same direction."

— Uma Naidoo, MD, Director of Nutritional and Metabolic Psychiatry, Massachusetts General Hospital

Related Research

What's new in lion's mane research: 2025–2026

Lion's mane continues to attract research attention for cognitive applications. A new clinical trial (NCT06870136) registered on ClinicalTrials.gov is evaluating the quality and effects of lion's mane extract in humans, adding to the still-limited interventional evidence base. The March 2026 comprehensive evidence review highlighted NGF stimulation as the compound's most promising mechanism, though human data remains largely limited to two small RCTs (Mori 2009, n=30; Nagano 2010, n=30). A growing area of interest is lion's mane's potential gut-brain axis effects, with preclinical studies in 2024–2025 demonstrating anti-inflammatory activity in gut tissue models. The distinction between fruiting body extracts (higher in hericenones/erinacines) and mycelium-on-grain products (often 40–60% starch) has become an increasingly important quality criterion, as researchers emphasize that extract standardization varies widely across commercial products.

Frequently Asked Questions

Does lion's mane help with anxiety?

One small RCT found that lion's mane reduced anxiety and depression scores in menopausal women after 4 weeks. A second pilot study found a near-significant trend toward reduced stress. The evidence is preliminary and limited. For anxiety specifically, ashwagandha has a stronger evidence base with multiple RCTs showing significant anxiety reduction and cortisol lowering.

Can lion's mane make anxiety worse?

No clinical trial has reported increased anxiety as a side effect. However, some individuals report feeling jittery or overstimulated, possibly due to NGF-mediated activation effects or reactions to mycelium-on-grain products. Should your anxiety worsen after starting lion's mane, discontinue use and consult a healthcare provider.

How long does lion's mane take to work for anxiety?

The Nagano trial showed results at 4 weeks. A single dose has no acute effect on mood (Surendran 2025). Most practitioners recommend 4–8 weeks of consistent daily supplementation before evaluating whether lion's mane is affecting your anxiety or mood.

Is lion's mane or ashwagandha better for anxiety?

For anxiety specifically, ashwagandha has substantially stronger evidence — multiple RCTs showing significant reductions in cortisol (27.9%), perceived stress, and anxiety scores. Lion's mane has one small positive trial. However, if your anxiety co-occurs with brain fog or poor cognitive function, combining both may provide complementary benefits through different mechanisms.

What dosage of lion's mane should I take for anxiety?

The Nagano trial used 2g/day; the Docherty trial used 1.8g/day. Clinical trials have generally used 1,000–3,000 mg/day. Starting at 500–1,000 mg/day and increasing gradually is a common approach. Use a fruiting body extract for the highest concentration of bioactive compounds.

The Bottom Line

One small trial found that lion's mane reduced anxiety in menopausal women. One pilot study found a near-significant stress reduction in young adults. A new trial is underway at Northumbria University. That's the honest state of the evidence — promising but far from conclusive.

If anxiety is your primary concern, ashwagandha is the better-supported starting point. If you're dealing with anxiety plus brain fog or cognitive issues, lion's mane may add value as a complementary supplement through its NGF-mediated support for neural health. Either way, the smartest approach is to start with the strongest evidence and add from there — not the other way around.

Why we wrote this article: YourHealthier manufactures and sells It mushroom and ashwagandha supplements. We pointed you toward ashwagandha as the stronger option for anxiety even though we sell both — because that's what the evidence supports. See our Editorial Policy.

*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. This article is for informational purposes only and is not a substitute for professional medical advice. If you experience persistent anxiety, consult a healthcare provider for proper evaluation and treatment.

References

Nagano, M., Shimizu, K., Kondo, R., et al. (2010). Reduction of depression and anxiety by 4 weeks Hericium erinaceus intake. Biomedical Research, 31(4), 231–237. PubMed
Docherty, S., Doughty, F. L., & Smith, E. F. (2023). The Acute and Chronic Effects of Lion's Mane Mushroom Supplementation on Cognitive Function, Stress and Mood in Young Adults. Nutrients, 15(22), 4842. PubMed
Menon, A., Jalal, A., Arshad, Z., Nawaz, F. A., & Kashyap, R. (2025). Benefits, side effects, and uses of Hericium erinaceus as a supplement: a systematic review. Frontiers in Nutrition, 12, 1641246. PubMed
Lai, P. L., Naidu, M., Sabaratnam, V., et al. (2013). Neurotrophic properties of the Lion's mane medicinal mushroom, Hericium erinaceus. International Journal of Medicinal Mushrooms, 15(6), 539–554. PubMed
Surendran, G., Saye, J., Binti Mohd Jalil, S., et al. (2025). Acute effects of a standardised extract of Hericium erinaceus on cognition and mood in healthy younger adults. Frontiers in Nutrition, 12, 1405796. PMC

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Sources verified: All PubMed citations and external references in this article were last verified onMay 14, 2026.

Disclosure: YourHealthier manufactures and sells the supplements discussed in this article. All health claims are based on published peer-reviewed research cited above. We earn revenue from product sales linked in this article.

*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. Consult your healthcare provider before starting any supplement regimen.

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