5 Natural Compounds Researchers Have Studied for Their Role in Memory and Mental Clarity
As interest in cognitive wellness grows, researchers continue to investigate which plant compounds and nutrients have the strongest evidence for supporting day-to-day mental performance. Here are five of the most studied — and what the peer-reviewed literature actually says.
Memory and mental sharpness change with age, with stress, with how well we sleep, and with what we eat. While there is no single ingredient that "fixes" cognition, a body of nutritional and herbal research has examined plant compounds and nutrients that may help support healthy cognitive function as part of a broader lifestyle. Below we summarize five of the most-studied options, the evidence behind each, and how people typically incorporate them.
This article is informational only and is not medical advice. Talk to a qualified healthcare professional before starting any new supplement, especially if you take medications or have a medical condition.
01.Bacopa monnieri
Used for centuries in traditional Ayurvedic practice, Bacopa monnieri (water hyssop) has been the subject of several modern human trials looking at memory and learning. A 2014 meta-analysis published in the Journal of Ethnopharmacology concluded that bacopa supplementation was associated with improvements in delayed word recall in healthy adults1.
- What it is
- A perennial herb whose active compounds are a family of saponins called bacosides.
- What the research suggests
- Standardized bacopa extracts have been associated with improvements in memory acquisition and retention over 12-week study periods in adults.
- How it's typically used
- Standardized extracts in the 300–450 mg range, taken daily with food, are the most studied protocols.
02.Lion's Mane mushroom (Hericium erinaceus)
Lion's Mane is an edible mushroom that has drawn interest for compounds called hericenones and erinacines, which laboratory studies suggest may influence nerve growth factor (NGF) signaling2. A small 2009 Japanese trial reported that older adults taking Lion's Mane powder showed improvements on cognitive function scales over 16 weeks compared with placebo3.
- What it is
- A culinary and medicinal mushroom native to North America, Europe, and Asia.
- What the research suggests
- Early human data suggest possible support for cognitive performance in older adults; larger, longer studies are still needed.
- How it's typically used
- Standardized fruiting body extracts, typically 500–1,000 mg per day.
03.Phosphatidylserine
Phosphatidylserine (PS) is a phospholipid that occurs naturally in cell membranes, including those of neurons. The U.S. Food and Drug Administration has acknowledged a qualified health claim that consumption of PS "may reduce the risk of cognitive dysfunction in the elderly," noting the evidence is limited and not conclusive4.
- What it is
- A phospholipid found in high concentrations in brain tissue.
- What the research suggests
- Several human trials have examined PS supplementation in adults reporting age-related memory complaints; outcomes have been mixed but generally favorable for memory tasks.
- How it's typically used
- 100–300 mg per day, often derived from soy or sunflower lecithin.
04.Omega-3 fatty acids (DHA)
Docosahexaenoic acid (DHA) is the predominant omega-3 fatty acid in the brain. Observational studies have associated higher dietary intake of DHA-rich foods, such as fatty fish, with better performance on cognitive assessments in older adults5. The U.S. Dietary Guidelines recommend at least two servings of seafood per week for general health.
- What it is
- An omega-3 polyunsaturated fatty acid concentrated in fish, algae, and certain seeds.
- What the research suggests
- Adequate DHA intake supports general brain health; supplementation studies in older adults show modest associations with verbal fluency and memory measures.
- How it's typically used
- Most studies use 500–1,000 mg of combined EPA + DHA per day from fish or algal oil.
05.Ginkgo biloba
Ginkgo extracts are among the most-studied botanical supplements globally. A standardized extract (EGb 761) has been examined in dozens of clinical trials looking at memory, concentration, and overall cognitive performance6. Results across studies have been mixed, but ginkgo remains commonly used in adults interested in supporting peripheral circulation and mental alertness.
- What it is
- An extract from the leaves of the ancient ginkgo tree, rich in flavonoids and terpene lactones.
- What the research suggests
- Some trials report modest improvements in subjective measures of mental alertness; effects on objective memory tests have been inconsistent.
- How it's typically used
- 120–240 mg of standardized extract per day, divided across meals.
The takeaway
None of these compounds are magic bullets, and the most important pillars of cognitive wellness remain sleep, physical activity, stress management, and a nutrient-dense diet. That said, several plant compounds and nutrients have meaningful published evidence behind them, and many adults choose to add a daily supplement to their routine as one piece of a broader wellness strategy.
Stacking five separate bottles of bacopa, Lion's Mane, phosphatidylserine, fish oil, and ginkgo every day is impractical for most people — both in terms of cost and the dosing schedule. As a result, blended formulas that combine multiple researched compounds in one daily capsule have become increasingly common in the cognitive-wellness category.
Looking for a convenient daily blend?
If you'd rather not assemble a regimen of separate bottles, a blended cognitive-support formula may be a more practical option. We've put together a short overview of a blend that contains researched compounds in evidence-based amounts.
See Our Recommended Blend → Read our overview before making a purchase decision.References
- Kongkeaw C, Dilokthornsakul P, Thanarangsarit P, et al. Meta-analysis of randomized controlled trials on cognitive effects of Bacopa monnieri extract. Journal of Ethnopharmacology. 2014.
- Mori K, Inatomi S, Ouchi K, et al. Improving effects of the mushroom Yamabushitake (Hericium erinaceus) on mild cognitive impairment: a double-blind placebo-controlled clinical trial. Phytotherapy Research. 2009.
- Mori K, et al. Effects of Hericium erinaceus on cognitive function in older adults. Phytotherapy Research. 2009.
- U.S. Food and Drug Administration. Qualified health claim petition: phosphatidylserine and cognitive dysfunction (Docket No. 2002P-0413), 2003.
- Yurko-Mauro K, McCarthy D, Rom D, et al. Beneficial effects of docosahexaenoic acid on cognition in age-related cognitive decline. Alzheimer's & Dementia. 2010.
- Weinmann S, Roll S, Schwarzbach C, et al. Effects of Ginkgo biloba in dementia: systematic review and meta-analysis. BMC Geriatrics. 2010.
Disclaimer. The statements on this page have not been evaluated by the U.S. Food and Drug Administration. The information here is for general educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. Individual results vary. Always consult a qualified healthcare professional before starting any new supplement, particularly if you are pregnant, nursing, take prescription medications, or have a medical condition.