Lion’s mane mushroom (Hericium erinaceus) does contain compounds that stimulate nerve growth factor (NGF) production in laboratory and animal studies, and one small but promising human trial showed measurable improvements in mild cognitive impairment — but the honest answer is that robust clinical evidence in humans is still thin. If you’re hoping it’s the memory-saving supplement your doctor just hasn’t told you about yet, the reality is more nuanced. It’s not snake oil, but it’s not a proven treatment either. Here’s what the current science actually supports, and how to think about it as part of a broader healthy-ageing strategy.

What is NGF, and why does it matter for your brain?

Nerve growth factor (NGF) is a protein your brain naturally produces to help neurons — your brain’s messaging cells — survive, grow, and maintain connections. Think of it as fertiliser for the neural pathways that govern memory, focus, and mood. As we age, NGF levels tend to decline, and researchers have long wondered whether boosting them could slow cognitive ageing or even reduce the risk of conditions like Alzheimer’s disease.

Lion’s mane contains two families of bioactive compounds — hericenones (found in the fruiting body) and erinacines (found in the mycelium, or root-like structure) — that have been shown in cell and animal studies to cross the blood-brain barrier and stimulate NGF synthesis. That’s genuinely interesting science. The leap from a petri dish to a meaningful benefit in a living, ageing human brain, however, is where things get complicated.

What does the human research actually show?

The most-cited human study, published in Phytotherapy Research in 2009, followed 30 Japanese adults aged 50–80 with mild cognitive impairment. Those who took 3 grams of lion’s mane powder daily for 16 weeks scored significantly better on a standard cognitive test than the placebo group. Encouraging — but it was a small study, and cognitive scores declined again after supplementation stopped.

A 2023 Australian trial at the University of Queensland tested a high-dose lion’s mane extract in healthy adults aged 18–59 and found improved processing speed on one cognitive task but no significant change in memory. A handful of other small trials hint at benefits for mood and mild anxiety, particularly in perimenopausal women.

The honest summary: preliminary positive signals, no large-scale randomised controlled trials (the gold standard), and no regulatory body — including the FDA or the European Food Safety Authority — has approved lion’s mane as a treatment for any cognitive condition. Claims you may see online that it “reverses dementia” or “regrows brain cells” are not supported by current evidence.

Is lion’s mane safe for adults over 60?

For most healthy older adults, lion’s mane appears to be well tolerated. Reported side effects in studies have been mild and uncommon — occasional digestive discomfort is the most frequent complaint. However, a few important cautions apply:

  • Bleeding risk: Animal studies suggest lion’s mane may slow blood clotting. If you take warfarin, aspirin, or other blood thinners, talk to your doctor before starting it.
  • Allergies: Anyone with mushroom allergies should avoid it.
  • Blood sugar: Some evidence suggests it may lower blood glucose, so people on diabetes medication should monitor carefully.
  • Quality control: Supplements are not as tightly regulated as prescription drugs in the US or UK. Look for products that have been third-party tested (NSF, USP, or Informed Sport certification are good markers).

A typical studied dose is 500 mg to 3 g of dried mushroom powder daily, usually taken with food. Extracts standardised to hericenone or erinacine content may be more potent, but dosing guidance for extracts is less established.

How does lion’s mane fit into a broader brain-health routine?

Here’s a perspective worth keeping in mind: no single supplement is likely to do as much for your cognitive health as a combination of the lifestyle habits that decades of research consistently support. Lion’s mane, at best, may offer a modest complementary benefit — it shouldn’t replace the foundations.

Movement matters most. For adults over 60, aerobic exercise — even brisk walking for 30 minutes most days — is one of the most evidence-backed ways to support brain volume, memory, and processing speed. Strength training twice a week also reduces fall risk and supports metabolic health. These are safe, effective, and free.

Diet shapes your brain. The Mediterranean and MIND diets (both emphasise vegetables, berries, olive oil, fish, legumes, and whole grains while limiting ultra-processed foods and red meat) are associated with slower cognitive decline in large long-term studies. No supplement replicates what a quality diet delivers over years.

Sleep is non-negotiable. During deep sleep, your brain literally flushes out waste proteins — including amyloid beta, which accumulates in Alzheimer’s disease — through a system called the glymphatic system. Poor sleep in your 60s and 70s is linked to faster cognitive ageing. If you’re struggling with sleep quality, addressing that is likely more impactful than any supplement on the market.

Vitamins seniors actually need: B12 deficiency (common after 60 because stomach acid production declines, affecting absorption) can mimic dementia symptoms. Vitamin D insufficiency is widespread and linked to cognitive decline. Omega-3 fatty acids from oily fish or algae-based supplements have modest but consistent support in the literature. These are worth discussing with your GP before adding lion’s mane to your routine.

Chronic pain and brain fog: Poorly managed chronic pain disrupts sleep, increases stress hormones, and directly impairs concentration. Non-opioid approaches — including physiotherapy, gentle yoga, anti-inflammatory diets, and cognitive behavioural therapy for pain — can break this cycle and improve mental clarity as a welcome side effect.

Should you try lion’s mane?

If you’re a healthy older adult curious about lion’s mane, the risk-to-potential-benefit ratio looks reasonable — provided you’re not on blood thinners, you choose a quality-tested product, and you go in with realistic expectations. Think of it as a potentially interesting addition to a solid foundation, not a shortcut to one. Tell your doctor or pharmacist before starting, especially if you take any regular medications.

Watch this space: several larger clinical trials are currently underway. The next few years may give us much clearer answers.

FAQ

Frequently Asked Questions

Does lion’s mane mushroom actually improve memory in older adults?

Small human trials show modest improvements in cognitive test scores, particularly in adults with mild cognitive impairment, but no large-scale clinical trials have confirmed this. The evidence is promising but not yet conclusive, so lion’s mane should not be treated as a proven memory treatment.

What exercises are safe and effective for adults over 60?

Brisk walking, swimming, and cycling are excellent low-impact aerobic options that support heart and brain health. Adding two sessions of resistance training per week helps maintain muscle mass, bone density, and balance — all of which reduce fall risk as you age.

Which vitamins and supplements do seniors actually need?

Vitamin B12, vitamin D, and omega-3 fatty acids are the three most commonly recommended for adults over 60, as deficiencies in these are both common and clinically significant. Always confirm with a blood test and your doctor before starting supplements, since individual needs vary considerably.

How can older adults improve sleep quality naturally?

Keeping a consistent sleep and wake time — even on weekends — is one of the most effective strategies. Limiting alcohol, reducing screen exposure in the hour before bed, and keeping the bedroom cool and dark also make a measurable difference. If sleep problems persist, cognitive behavioural therapy for insomnia (CBT-I) is more effective long-term than sleep medications for most older adults.

How can seniors manage chronic pain without opioids?

Physiotherapy, gentle movement like tai chi or water aerobics, anti-inflammatory eating patterns, and cognitive behavioural therapy for pain are all evidence-backed non-opioid approaches. Topical treatments such as diclofenac gel or capsaicin cream can also provide localised relief with fewer systemic side effects than oral pain medications.