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Above the neck
Cognitive enhancement is the hardest category to evaluate, because the outcome is subjective, expectation effects are large, and most products contain too many ingredients to attribute anything.
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Cognition and nootropicsA 2026 trial found a single dose reduced cognitive deterioration during sleep deprivation. That is a narrower and more interesting finding than the coverage suggested.
Cognition and nootropicsStacks are designed so that no individual ingredient can be evaluated. That is convenient for the seller and useless for the buyer.
Cognition and nootropicsUnfashionable, cheap, and better supported than almost anything sold as a nootropic. The interesting part is what theanine subtracts rather than adds.
Cognition and nootropicsLess than the phrase implies, and the gap is where most of the persuasion happens.
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