Cognitive Performance: Habits, Nootropics and Claims

What this page covers

"Nootropics" is a marketing term for supplements, drugs and other products said to sharpen memory, focus or thinking. It is not a medical category. This page covers habits, products and their limits. For supplement profiles see nootropics, nootropic evidence by outcome and nootropic safety and claim checks. Labels used: established, promising but limited, mixed, insufficient evidence, evidence of harm, marketing claim.

Cognitive Performance

Habits. A 2023 meta-analysis of 54 randomized trials in healthy people found exercise benefitted overall cognition and all the cognitive areas examined, with older adults showing the greatest gains. [1] Label: promising, with randomized-trial support; effects vary by exercise type and group. See brain-healthy habits and brain fog.

Supplements. The US National Center for Complementary and Integrative Health says direct evidence that supplements can prevent Alzheimer's disease or other dementias is lacking. [2] It adds that there is no conclusive evidence ginkgo can prevent or slow dementia or cognitive decline. [2] Those findings concern dementia prevention rather than sharper thinking in healthy young adults; for that goal, Proper evidence not found in the government sources we read.

Prescription stimulants used off-label. A 2020 meta-analysis of 47 studies in healthy, non-sleep-deprived adults found a small overall effect of modafinil and a larger overall effect of methylphenidate, and no effect of d-amphetamine. [3] These are prescription medicines with their own risks; using them without a prescription is not covered or recommended here. Label: mixed, small effects in a laboratory setting.

Dangerous products sold as nootropics. The FDA says tianeptine is not approved for any medical use, that reports of severe side effects are increasing, and that some companies make dangerous, unproven claims that it can improve brain function. [4] Treat any product marketed this way as evidence of harm.

Safety basics. "Natural" does not always mean "safe," supplements can interact with medicines, and rules for supplements are less strict than for drugs. [5] Tell your clinician what you take. Do not delay seeing a clinician about memory problems, since treatable causes include depression, medication reactions and thyroid, liver or kidney problems. [2]

How to judge a focus claim

Ask: Who was studied? Was it a healthy person like me? Was the outcome a test score or real life? Was it compared with a placebo? Our full list is in how to evaluate a biohack.