Does lion's mane mushroom work for the brain?

Lion's mane is one of the most promising medicinal mushrooms, with research showing nerve growth factor (NGF) induction. Human RCTs in mild cognitive impairment are encouraging though small.

Chinese Herbs for Cognitive Function and Brain Health

Name: Dr (TCM) Attilio D'Alberto
Brand: Dr (TCM) Attilio D'Alberto
SKU: hd-local-wokingham-rg-40
Rating: 5 (227 reviews)

By Dr (TCM) Attilio D'Alberto | Traditional Chinese Medicine Practitioner, Wokingham

Brain fog, poor concentration, slow recall and mental fatigue are among the most common complaints I see in clinic — and very often the first reason a busy professional, postnatal mother or perimenopausal woman walks through the door. Modern life rarely lets the brain rest: chronic stress, broken sleep, screens, alcohol, hormonal change, viral illness and undertreated anxiety all add up to a tired, sticky cognition that no amount of coffee can really fix. Traditional Chinese medicine has a sophisticated framework for cognitive function — built around the Heart (which houses the mind), the Kidneys (which produce the marrow and the brain), and the Spleen (which produces the qi and blood that the brain runs on) — and a deep pharmacopoeia of herbs that genuinely change how the brain feels.

On this page

What "brain fog" actually is
Common causes
The TCM view of cognition
TCM patterns behind brain fog
Key single herbs
Classical formulas
Acupuncture
Diet, sleep and lifestyle
Western supplements with evidence
When to investigate
FAQs

What "brain fog" actually is

"Brain fog" is a non-medical term that captures slowed thinking, poor concentration, word-finding difficulty, short-term memory lapses and a feeling that the brain is wading through treacle. It is not a single disease but a final common picture produced by many underlying mechanisms — neuroinflammation, mitochondrial dysfunction, low cerebral perfusion, neurotransmitter imbalance, sleep loss and chronic stress. It is real, measurable on cognitive testing, and very often reversible.

Common causes

Sleep loss — the single biggest driver in working-age adults.
Chronic stress and high cortisol — shrinks the hippocampus over time.
Perimenopause and menopause — oestrogen drops affect cognition for many women.
Postnatal — sleep loss + hormonal shift + low ferritin.
Long Covid and post-viral syndromes — neuroinflammation and autonomic dysfunction.
Thyroid disease — both hypo- and hyperthyroidism impair cognition.
B12, iron and vitamin D deficiency.
Depression and anxiety — "pseudodementia" of severe depression is fully reversible.
Medication side effects — antihistamines, opioids, anticholinergics, some antidepressants.
Alcohol and recreational drugs.
Insulin resistance and metabolic syndrome — "type 3 diabetes".
Sleep apnoea — under-recognised, common in middle-aged men.
Early neurodegenerative disease — needs ruling out if progressive.

The TCM view of cognition

In Chinese medicine, the brain is referred to as the "sea of marrow" and is intimately connected to the Kidneys, which produce the marrow. The Heart "houses the spirit" (shen) and is responsible for clarity of thinking. The Spleen makes the qi and blood that the Heart and brain depend on. Three organ systems therefore feed cognition, and in practice three patterns appear repeatedly:

TCM patterns behind brain fog

Heart blood deficiency — anxious brain fog, broken sleep, palpitations, vivid dreams, pale tongue. Common in postnatal women, those with heavy periods, vegetarians and stressed workers.
Spleen qi deficiency — sluggish thinking, fatigue after eating, sugar cravings, loose stools. Common in chronic illness, post-viral fatigue and burnout.
Kidney jing deficiency — age-related cognitive decline, hair loss, low back pain, tinnitus, low libido.
Phlegm misting the orifices — heavy, foggy head, slow processing, often with weight gain, lipid problems, sluggish digestion.
Liver qi stagnation — stress-driven brain fog with irritability, sighing, premenstrual worsening.
Heart-Kidney disharmony — anxiety + insomnia + memory loss + night sweats; common in perimenopause.
Liver yang rising — restless cognition, headache, dizziness, irritability.
Blood stasis — late-stage cognitive decline, post-stroke, post head trauma.

Key single herbs

Ren Shen (Panax ginseng) — perhaps the most studied cognitive herb in the world. RCTs in healthy volunteers and dementia patients show improved working memory, reaction time and mental fatigue. Tonifies original qi, lifts the spirit and supports both Heart and Kidney.
Yuan Zhi (Polygala root) — opens the orifices and connects Heart and Kidney. Modern research shows effects on BDNF, acetylcholine and neuroinflammation. Useful for anxiety with cognitive impairment.
Suan Zao Ren (Jujube seed) — nourishes Heart blood and calms the spirit; the workhorse herb for anxious-insomniac brain fog.
Wu Wei Zi (Schisandra) — consolidates jing, improves cognitive endurance and protects neurons. Highly studied as an adaptogen.
Shi Chang Pu (Acorus) — opens the orifices and clears phlegm from the head; classic for foggy, heavy cognition.
Lion's Mane (Hericium / Hou Tou Gu) — modern research shows induction of nerve growth factor (NGF); promising for cognitive decline and post-viral fog. See medicinal mushrooms.
He Shou Wu (Polygonum multiflorum) — tonifies Kidney essence; traditional anti-ageing brain herb. Avoid the raw form long-term because of hepatotoxicity reports; prepared form is generally safer.
Gou Qi Zi (Goji berries) — nourish Liver and Kidney yin; mild cognitive support.
Dan Shen (Salvia miltiorrhiza) — improves microcirculation; useful in post-stroke and vascular cognitive impairment.
Bacopa monnieri — although Ayurvedic in origin, often used alongside Chinese herbs; good RCT evidence for memory in older adults.
Ginkgo biloba — modest evidence in age-related cognitive decline; useful for vascular contributions.

Classical formulas

Gui Pi Tang — Heart and Spleen blood deficiency; the workhorse for anxious, tired, foggy professional women and postnatal mothers.
Tian Wang Bu Xin Dan — Heart blood and yin deficiency with insomnia, anxiety, vivid dreams.
An Shen Ding Zhi Wan — anxious brain fog with palpitations and timidity.
Bu Zhong Yi Qi Tang — Spleen qi deficiency with fatigue and post-viral fog.
Liu Wei Di Huang Wan / Zuo Gui Wan — Kidney yin and jing deficiency, age-related decline.
You Gui Wan — Kidney yang deficiency, cold-type cognitive decline.
Er Chen Tang or Wen Dan Tang — phlegm misting the orifices.
Xiao Yao San or Jia Wei Xiao Yao San — Liver qi stagnation with stress-driven fog.
Tian Ma Gou Teng Yin — Liver yang rising with brain fog and headache.
Bu Yang Huan Wu Tang — qi deficiency with blood stasis; classical post-stroke formula.

I prescribe pharmaceutical-grade granules from Sun Ten in Taiwan, blended individually for the presenting pattern.

Acupuncture

Acupuncture for cognitive function works on several levels: it improves cerebral blood flow on functional MRI, modulates the HPA axis and stress response, and improves sleep architecture. RCTs and meta-analyses support its use in mild cognitive impairment, post-stroke cognition, perimenopausal cognitive symptoms and post-Covid brain fog.

Typical points: GV 20 (Baihui), GV 24, Yintang, Sishencong, GB 20, HT 7, PC 6, KI 3, BL 23, ST 36, SP 6, with scalp acupuncture for more significant cognitive impairment.

Diet, sleep and lifestyle

Sleep 7-9 hours — non-negotiable for cognition.
Mediterranean-style diet — best evidence for protecting cognition.
Oily fish twice a week — DHA is structural to the brain.
Berries, dark leafy greens, walnuts, olive oil.
Reduce ultra-processed food, refined sugar and alcohol.
Daily exercise — strongest single non-pharmacological cognitive protector; 30+ minutes of moderate activity, ideally with strength training.
Cognitive challenge — language, music, complex hobbies; "use it or lose it".
Social connection — protective against cognitive decline.
Treat hearing loss — under-recognised cognitive risk factor in older adults.
Stress reduction — meditation, breathwork, time outdoors.
Limit screens before bed.

Western supplements with evidence

Omega-3 (EPA/DHA, 1-2 g) — supports membrane fluidity and neuroinflammation.
Vitamin B12 (methylcobalamin) — see B12 article; cognitive symptoms are an early sign of deficiency.
Vitamin D3 — deficiency is associated with worse cognition.
Magnesium L-threonate — crosses the blood-brain barrier; modest cognitive evidence.
Phosphatidylserine 100-300 mg — supports memory in older adults.
L-theanine — calm focus; pairs with caffeine.
Citicoline (CDP-choline) 250-500 mg — small but consistent evidence.
Curcumin (highly bioavailable forms) — anti-inflammatory; modest evidence in mild cognitive impairment.

When to investigate

See your GP if you have:

Progressive cognitive decline interfering with daily function.
New disorientation, getting lost in familiar places.
Personality change.
Cognitive change with focal neurological symptoms.
Severe headache, visual change or seizure.
Symptoms in the context of head injury.

Useful baseline tests: full blood count, ferritin, B12, folate, vitamin D, TSH, HbA1c, U&E, calcium, LFTs, lipid profile.

Frequently asked questions

Which Chinese herb is best for brain fog?

It depends on pattern. Ginseng for fatigue-type fog, Yuan Zhi and Suan Zao Ren for anxious-insomniac fog, Shi Chang Pu and Er Chen Tang for phlegm-type heavy fog, He Shou Wu and Liu Wei Di Huang Wan for age-related decline. A pattern-tailored prescription is more effective than any single herb.

Does ginseng improve memory?

Yes. Multiple RCTs in healthy volunteers and in early cognitive decline show modest but real improvements in working memory and reaction time. Korean red ginseng has the strongest dataset.

Does lion's mane work for the brain?

It is one of the most promising of the medicinal mushrooms — modern research shows nerve growth factor (NGF) induction. Human RCTs in mild cognitive impairment are encouraging though small. Useful as part of a combined strategy.

Can Chinese medicine help long Covid brain fog?

Yes — the post-viral pattern often combines Spleen qi deficiency, phlegm and Heart blood deficiency. Tailored herbal treatment with acupuncture is one of the more useful complementary tools for this presentation.

What about perimenopausal brain fog?

It is one of the most under-recognised perimenopausal symptoms. Treatment combines Heart-Kidney harmonising herbs (Tian Wang Bu Xin Dan, Er Xian Tang), HRT where appropriate, sleep optimisation and exercise. Most women see clear improvement in 8-12 weeks.

Is brain fog a sign of dementia?

Usually not. Most brain fog is from sleep, stress, hormones, post-viral states and metabolic factors, all reversible. Progressive decline interfering with daily function does need formal assessment.