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Bacopa has more trials for memory: in healthy and older adults, about 300 mg a day for 12 weeks sometimes improved recall and attention speed, but a careful 2025 trial found no benefit. Lion’s mane has only a handful of small trials, mostly in older adults with mild cognitive impairment, using 1–3 g a day. Neither works quickly, and no trial has tested them together.
In This Article
Lion's mane supplements compared: powder vs extract (2026)
| Product | On the label | Good to know | Buy |
|---|---|---|---|
| NOW Lion's Mane 500 mg | 1,000 mg organic lion's mane mushroom powder per 2 capsules | Whole mushroom powder: the label gives no extract ratio or compound levels. | See it on Amazon ↗ |
| Real Mushrooms Lion's Mane | 1,000 mg organic lion's mane extract per 2 capsules, with 300 mg beta-glucans | An extract with its beta-glucan content stated on the label. | See it on Amazon ↗ |
| Host Defense Lion's Mane | 1 g organic lion's mane per 2 capsules | The label in the NIH database lists no extract ratio. | See it on Amazon ↗ |
Human evidence is still limited: the best-known trial had 30 people (Mori 2009).
Label figures: NIH Dietary Supplement Label Database and the brand listing, checked October 2026. Formulas change, so check the label before you buy. We earn a commission on Amazon purchases at no extra cost to you, and we do not lab-test products.
Bacopa vs Lion’s Mane at a Glance
| Bacopa | Lion’s mane | |
|---|---|---|
| What it is | An Ayurvedic herb (Bacopa monnieri) | An edible mushroom (Hericium erinaceus) |
| Main use studied | Memory and attention in healthy adults and older adults | Memory in older adults with mild cognitive impairment |
| Doses in trials | Usually 300 mg a day of extract; 600 mg or more in some | 1-3 g a day of mushroom or mycelium products |
| Trial length | Usually 12 weeks | 12 to 49 weeks |
| Strength of evidence | Many small trials with mixed results; a 2025 trial found no memory benefit | A handful of small trials |
| Common side effects | Stomach upset, digestive complaints, headache | Stomach discomfort, nausea, skin rash |
What the Research Shows for Bacopa
Dosage Quick Reference
Lion's mane dosing protocol
Memory (older adults)
1-3g/day
Doses used in small trials
Trial length
12-49 weeks
Mostly in mild cognitive impairment
Form
Fruiting body or mycelium
Both have small positive trials
Timing
Any time
No trial has compared timing
After stopping
Effect faded
Within 4 weeks in one trial
Healthy adults
Little evidence
A few small trials in young adults, with small or no effects
⚠️ Reported side effects include stomach discomfort, nausea and skin rash. Avoid it if you are allergic to mushrooms, and see a doctor about memory problems before trying supplements.
- Attention speed: a meta-analysis of 9 trials (518 people) found faster performance on attention tests, but the differences were small, a matter of milliseconds (Kongkeaw et al., 2014).
- Older adults: in 54 people aged 65 or older without dementia, 300 mg a day for 12 weeks improved delayed word recall compared with placebo; side effects were few and mostly stomach upset (Calabrese et al., 2008).
- A null result: in 101 adults aged 40–70 with memory complaints, 300 mg a day for 12 weeks did not improve verbal learning, attention or working memory more than placebo, although people felt less stressed; digestive complaints and headaches were more common on bacopa (Lopresti and Smith, 2025).
- Dose: a 2026 network meta-analysis of 29 trials in healthy adults found the clearest working-memory gains at 600 mg a day or more, but most comparisons were indirect (Tiemtad et al., 2026).
- Alzheimer’s disease: a review of 5 trials judged all of them at high risk of bias and the evidence very low quality (Basheer et al., 2022).
What the Research Shows for Lion’s Mane
- Mild cognitive impairment: in 30 Japanese adults aged 50–80, 3 g a day of mushroom powder for 16 weeks raised cognitive scores compared with placebo; the scores fell again 4 weeks after stopping (Mori et al., 2009).
- Older adults: in a 12-week placebo-controlled trial, a fruiting-body supplement improved one of three cognitive tests (Saitsu et al., 2019).
- Mild Alzheimer’s disease: in a small 49-week pilot trial, an erinacine A-enriched mycelium gave better cognitive scores than placebo; 4 people dropped out because of stomach discomfort, nausea or rash (Li et al., 2020).
- Healthy young adults: in 41 adults, a single 1.8 g dose made them faster on one attention test, and after 28 days there was only a trend toward lower stress (Docherty et al., 2023).
- A 2025 systematic review found five randomized trials and three pilot trials, most of them small (Menon et al., 2025). For products checked against their labels, see our lion’s mane guide.
Which One to Choose
- Memory and attention in healthy adults: bacopa has more trials, with mixed results. Give it about 12 weeks; it does not work in a day.
- Memory changes with age: both have small positive trials in older adults. See a doctor first, because memory problems can have treatable causes.
- Taking both: no trial has tested them together, so there is no evidence that the pair works better than either one.
Side Effects and Safety
- Bacopa: stomach upset, digestive complaints and headaches were the most common side effects in trials (Calabrese et al., 2008; Lopresti and Smith, 2025).
- Lion’s mane: reported side effects include stomach discomfort, nausea, headache, skin rash and allergic reactions (Menon et al., 2025). Avoid it if you are allergic to mushrooms.
- Neither has good safety data in pregnancy, breastfeeding or children. If you take prescription medicines, ask your doctor or pharmacist first.
⭐ Our Verdict
Our Verdict on Lion's Mane Mushroom
Lion's mane has a handful of small human trials, mostly in older adults with mild cognitive impairment, using 1-3 g a day for 3 months or more; in one, the benefit faded within 4 weeks of stopping. Evidence in healthy young adults is very limited. Both fruiting-body and mycelium products have small positive trials, so choose one that states its dose on the label.
See Host Defense Lion's Mane →Affiliate link: we may earn a commission at no extra cost to you
Scientific References
- Kongkeaw C, et al. Meta-analysis of randomized controlled trials on cognitive effects of Bacopa monnieri extract. J Ethnopharmacol. 2014. PMID 24252493
- Calabrese C, et al. Effects of a standardized Bacopa monnieri extract on cognitive performance, anxiety, and depression in the elderly: a randomized, double-blind, placebo-controlled trial. J Altern Complement Med. 2008. PMID 18611150
- Lopresti AL, Smith SJ. The effects of a Bacopa monnieri extract on cognition, stress, and fatigue in healthy adults: a randomized, double-blind, placebo-controlled trial. Clin Drug Investig. 2025. PMID 41091332
- Tiemtad P, et al. Comparative effects of Bacopa monnieri and Ginkgo biloba on cognitive functions: a systematic review and network meta-analysis. Phytomedicine. 2026. PMID 41678913
- Basheer A, et al. Use of Bacopa monnieri in the treatment of dementia due to Alzheimer disease: systematic review of randomized controlled trials. Interact J Med Res. 2022. PMID 35612544
- Mori K, et al. Improving effects of the mushroom Yamabushitake (Hericium erinaceus) on mild cognitive impairment: a double-blind placebo-controlled clinical trial. Phytother Res. 2009. PMID 18844328
- Saitsu Y, et al. Improvement of cognitive functions by oral intake of Hericium erinaceus. Biomed Res. 2019. PMID 31413233
- Li IC, et al. Prevention of early Alzheimer’s disease by erinacine A-enriched Hericium erinaceus mycelia: pilot double-blind placebo-controlled study. Front Aging Neurosci. 2020. PMID 32581767
- Docherty S, et al. The acute and chronic effects of lion’s mane mushroom supplementation on cognitive function, stress and mood in young adults: a double-blind, parallel groups, pilot study. Nutrients. 2023. PMID 38004235
- Menon A, et al. Benefits, side effects, and uses of Hericium erinaceus as a supplement: a systematic review. Front Nutr. 2025. PMID 40959699
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Frequently Asked Questions
The evidence is early. A small 2009 Japanese trial in 30 older adults with mild cognitive impairment saw better scores on a cognitive test after 16 weeks at 3 g a day, and the gains faded after stopping. Studies in healthy adults are few and show small effects.
Neither form has strong human trials: a 2009 memory trial used fruiting body powder (Mori et al., 2009) and a 49-week trial used mycelium (Li et al., 2020). Some mycelium products are grown on rice or other grain and include it, so check the label for which part of the mushroom is used and, ideally, a beta-glucan amount.
Trials gave it daily for 4 to 49 weeks, with few side effects reported (Li et al., 2020). Long-term safety data are limited, so follow the label dose and stop if you notice digestive upset or an allergic reaction. There is no clinical evidence that cycling it is necessary.
Only early evidence: in a small 2010 Japanese trial, 30 women ate lion's mane or placebo cookies for 4 weeks. Depression and complaint scores fell in the lion's mane group, while anxiety and irritability only tended to be lower than with placebo (Nagano et al., 2010). Larger trials are needed. It is not sedating; if you are managing anxiety, talk to your doctor before adding supplements.
Fresh Lion's Mane mushroom has a mild, seafood-like flavor (sometimes compared to crab or lobster). It's delicious when pan-fried in butter. Supplements give a more consistent dose than the fresh mushroom, but neither has strong evidence for health benefits.