Systematic reviews and meta-analyses of clinical human research using low doses of certain central nervous system stimulants found that these drugs enhance cognition in healthy people.
Ukubuyekezwa okuhleliwe nokuhlaziywa kwe-meta-ucwaningo lwesayensi yemitholampilo kusetshenziswa imithamo ephansi yokuvuselelwa okuthile kwesistimu yezinzwa kuthola ukuthi le mishanguzo ithuthukisa ukuqondisisa kubantu abanempilo.