Skip to main content
Affiliate disclosureWe earn a commission if you buy through links on this page, at no extra cost to you. Read our methodology →
MushroomClinical dose · 1–1.8g/day in healthy-adult trials; 3g/day dry powder in the mild cognitive impairment trialOnset · Small acute effects within 1–2 hours in pilot trials; the MCI benefit built over 8–16 weeks

Lion's Mane

A 2009 double-blind, placebo-controlled trial (Mori et al., n=30) found higher cognitive function scores in adults with mild cognitive impairment after 16 weeks of 3g/day; scores fell again within 4 weeks of stopping. Its lead author works for Hokuto Corporation, a mushroom producer. A 2019 multicentre RCT improved MMSE scores but not the two other memory tests. In healthy adults, two small 2023 pilot RCTs found acute gains on Stroop, N-Back and reaction-time tasks at 1–1.8g, and only a non-significant trend toward lower stress after 28 days. The evidence is small-sample and short-term.

By The Nootropic Lab editorial teamUpdated 8 min read✓ Fact-checked

Evidence reviewed:

Mechanism of action

Lion's Mane (Hericium erinaceus) contains hericenones and erinacines that stimulate the synthesis of Nerve Growth Factor (NGF) in cell and animal studies. NGF promotes neuronal survival, differentiation, and maintenance of neurons in the hippocampus and cortex — regions central to learning and memory. No human trial has yet measured NGF levels after supplementation.

Clinical evidence summary

A 2009 double-blind, placebo-controlled trial (Mori et al., n=30) found higher cognitive function scores in adults with mild cognitive impairment after 16 weeks of 3g/day; scores fell again within 4 weeks of stopping. Its lead author works for Hokuto Corporation, a mushroom producer. A 2019 multicentre RCT improved MMSE scores but not the two other memory tests. In healthy adults, two small 2023 pilot RCTs found acute gains on Stroop, N-Back and reaction-time tasks at 1–1.8g, and only a non-significant trend toward lower stress after 28 days. The evidence is small-sample and short-term.

Human effect matrix

Based on human clinical trials only. Animal and in-vitro data excluded.

EffectEvidenceMagnitudeStudies
Memory & Learning moderate
Moderate
4
Mood & Stress preliminary
Negligible
1

Evidence key: Strong = multiple consistent RCTs · Moderate = smaller/fewer RCTs · Preliminary = early trials or small n · Mixed = conflicting results

Documented benefits

  • Higher cognitive scores in mild cognitive impairment (one 16-week RCT)
  • Small acute attention and reaction-time gains in healthy adults (pilot RCTs)
  • NGF stimulation (cell and animal studies only)

Side effects & cautions

  • Generally well tolerated; the 16-week MCI trial reported no adverse effects on laboratory tests
  • Rare: mild GI discomfort at high doses

How to take

Dosage1–1.8g/day (healthy-adult trials); the MCI trial used 3g/day of dry powder, so lower doses may not reproduce its result
TimingMorning, with breakfast
With foodFat-soluble compounds absorb better with a meal containing some fat. Taking on an empty stomach is fine but a meal improves consistency.
FormsCapsule or powder. Always choose fruiting body extract (hot-water or dual extracted), not mycelium-on-grain — mycelium products may be mostly starch with minimal active compounds.

Stacking recommendations

Ingredients that pair well with Lion's Mane and why.

Bacopa Monnieri

Classic long-term memory stack. Bacopa consolidates memory via synaptic density; Lion's Mane supports NGF. Together they cover both neurogenesis and synaptic pathways.

Citicoline

Citicoline provides an acute focus effect while Lion's Mane builds long-term neuroprotection — a complementary short- and long-term pairing.

Ashwagandha

Ashwagandha reduces cortisol (which suppresses NGF expression); combining with Lion's Mane may amplify neurogenic effects under stress.

Frequently asked questions

Fruiting body vs mycelium — which should I buy?

Always choose fruiting body extract. Mycelium is grown on grain substrate and most commercial mycelium products contain primarily starch, not active hericenones. Look for "fruiting body" or "dual extract" on the label. Verified extracts like that in Mind Lab Pro use 500mg fruiting body at meaningful concentrations.

How long before I notice results?

Two small 2023 pilot trials found modest acute effects on attention and reaction-time tasks 1–2 hours after a single 1–1.8g dose. The clearest result — in mild cognitive impairment — built over 8–16 weeks of 3g/day (Mori 2009) and faded within 4 weeks of stopping. Do not judge this supplement at 2 weeks.

Can I take Lion's Mane every day?

Daily use is how it was tested, but only for a limited time: daily dosing was used for up to 16 weeks in the MCI trial (Mori 2009), the other trials reviewed ran 12 weeks or less and the healthy-adult pilots 28 days or less, so longer-term controlled safety data are limited. Unlike some adaptogens, Lion's Mane is not cycled in the trials; the 16-week MCI trial used daily dosing and scores declined within 4 weeks of stopping, so any benefit appears to depend on continued use.

Does Lion's Mane interact with any medications?

None of the human trials reviewed reported drug interactions, but they were small and short. Always check with your doctor if you are on prescription drugs.

What does the research actually show for healthy adults?

Studies in healthy adults are small pilots. Docherty 2023 (n=41, 1.8g/day) found faster Stroop performance 60 minutes after a dose and only a non-significant trend toward lower stress after 28 days; La Monica 2023 found faster N-Back and Go reaction times 2 hours after 1g. Effects are subtler in healthy people than in mild cognitive impairment.

Top stacks containing Lion's Mane

Mind Lab Pro

9.4/10

Opti-Nutra

Editor's Choice

Alpha Brain

6.6/10

Onnit

Lion's Mane in Southeast Asia

Lion's mane (Hericium erinaceus) is not named individually in the FDA Philippines, NPRA and ASEAN documents cited below. As a mushroom-derived extract it is not squarely a "botanical" in the strict plant sense that some definitions use, but it fits the broader other dietary substance … of … natural origin category the Philippines' FDA uses, and Malaysia's NPRA definition covering natural-source extracts, isolates and concentrates more generally. None of the documents cited below names lion's mane as prohibited or restricted for health supplements in any of the six markets.

How lion's mane fits the general ingredient rules

The Philippines' FDA Circular No. 2025-001 defines a food/dietary supplement as containing one or more "dietary ingredients: vitamin, mineral, amino acid, herb, or other dietary substance of botanical, animal, artificial or natural origin," a category broad enough to cover a fungal extract such as lion's mane under other dietary substance … of … natural origin without naming it specifically. Singapore's HSA applies its general rule that "all ingredients used in health supplements (HS) and traditional medicines (TM) must be substantiated for safety," since lion's mane is absent from the guideline's named ingredient annexes. Malaysia's NPRA directs buyers to its product-search database, noting documentation for a new active ingredient "must support the safety use and dose of new active ingredients as a health supplement."

Products in Southeast Asia

HSA / NPRA / BPOM / FDA PH / Thai FDA

Is lion's mane / Hericium erinaceus named on the ASEAN negative list for health supplements?

No. The ASEAN Guiding Principles document states its negative list "lists the active substances that are prohibited from being used in or being part of the composition of Health Supplements," and lion's mane / Hericium erinaceus is not one of the substances the list's Appendix 1 names.

Does Singapore's HSA restrict lion's mane supplements?

A lion's mane-specific restriction was not found. HSA's October 2025 guideline on prohibited and restricted ingredients does not name it, so the guideline's general standard applies: "all ingredients used in health supplements (HS) and traditional medicines (TM) must be substantiated for safety."

SEA country guides

Sources: FDA Philippines — Circular No. 2025-001, Guidelines on the Classification of Vitamins and Minerals for Food/Dietary Supplements for Adults · HSA — Guidelines on Prohibited and Restricted Ingredients in Health Supplements and Traditional Medicines (Oct 2025) · NPRA — Drug Registration Guidance Document, Appendix 4: Guideline on Registration of Health Supplements · NPRA — Drug Registration Guidance Document, Appendix 4: Guideline on Registration of Health Supplements · ASEAN — Guiding Principles for Inclusion into or Exclusion from the Negative List of Substances for Health Supplements

Regulatory note

Health supplements in Singapore are regulated by the Health Sciences Authority (HSA); in Malaysia by the National Pharmaceutical Regulatory Agency (NPRA); in Indonesia by the Badan Pengawas Obat dan Makanan (BPOM); in the Philippines by FDA Philippines; in Thailand by FDA Thailand. Halal certification is required by law for supplements marketed to Indonesian consumers from 18 October 2026, regulated by the Badan Penyelenggara Jaminan Produk Halal (BPJPH); in Malaysia, products described as halal must be certified, with the Jabatan Kemajuan Islam Malaysia (JAKIM) as the certifying body. We surface certification status per product where verifiable. This page is editorial, not medical advice. Consult a qualified healthcare professional before starting any supplement.

Sources (4)expand
← Back to Ingredients Guide