Amuna amafunika kumwa tiyi wobiriwira nthawi zambiri. Asayansi apeza chinthu L-theanine chakumwa, chomwe chimagwira ntchito muubongo wa abambo ndikuwonjezera kuthekera kwawo kuganiza ndikupanga zisankho. Kupeza kumeneku kunayambitsidwa ndi kuyesa komwe odzipereka 44 adatenga nawo gawo.
Poyamba, omwe adafunsidwa adafunsidwa kuti amwe tiyi wobiriwira. Pambuyo pake, pafupifupi ola limodzi pambuyo pake, tidawayesa. Zotsatira zake, chithunzicho chidapezeka motere: odzipereka omwe adamwa tiyi mayeso asanayesedwe adachita bwino ndi mayeso. Ubongo wawo umagwira ntchito molimbika kuposa omwe samamwa tiyi.
Chakumwa, madokotala amati, chili ndi ma polyphenols ambiri. Ntchito zawo ndi zothandiza onenepa, matenda a shuga, atherosclerosis, matumbo matenda. Koma pazifukwa ziti zinthuzi zimakhudzira amuna kwambiri, asayansi sanadziwebe.