ANABIOTICASubmit a source Nootropics.
Nootropics combine very different goals: staying awake, changing sleep timing, reducing stress, and improving memory are not interchangeable outcomes. Acute laboratory-task effects also do not establish durable gains in daily cognition.
8 evidence-ranked entriesWhat the evidence cannot settle yet
Trials are commonly small, short, and sensitive to dose, baseline sleep, extract, and the cognitive test selected. Product-specific botanical findings and approved uses of prescription medicines should not be generalized to healthy-user enhancement.
Risks depend on the intervention
Sleep disruption, sedation, anxiety, cardiovascular effects, medicine interactions, and inconsistent supplement contents recur across the category. Prescription status and anti-doping rules also matter for some entries.
Strong evidence leads this category
Ratings compare confidence in each entry's stated benefit—not whether every intervention is appropriate or recommended.
How ratings workEvery nootropics entry
Sorted from stronger to weaker evidence.
Caffeine
A well-studied stimulant that reliably improves alertness and attention, with sleep disruption and tolerance as the main tradeoffs.
Melatonin
A circadian-timing hormone useful for jet lag and selected sleep-timing problems, with only small average effects in chronic insomnia.
Caffeine + L-Theanine
A tea-derived pairing with evidence for small, short-term attention benefits in controlled laboratory tasks.
Bacopa Monnieri
A traditional herbal extract with inconsistent modern evidence for memory and attention and meaningful variation between products.
Modafinil
A prescription wakefulness medicine with only a very small average cognitive effect in rested healthy adults and important medical, interaction, and sporting constraints.
Lion's Mane
A popular medicinal mushroom with intriguing preclinical biology but mixed, tiny, and product-specific human cognition studies.
Ashwagandha
A traditional botanical with small short-term stress and sleep trials, substantial product variation, and uncommon liver and thyroid risks.
Ginkgo Biloba
A widely marketed botanical that has not prevented dementia or slowed normal cognitive decline in large, rigorous trials.