Yawancin magungunan barci na halitta suna aiki ta hanyar GABA, amma luteolin yana nuna tasiri ta wani mabudi daban: reseptocin adenosine da caffeine ke toshewa. A cikin beraye, luteolin ya rage lokacin shirin barci, ya ƙara jimillar lokacin barci, kuma ya ƙara barcin NREM, yayin da caffeine ya kusan soke dukkan tasirin. Wannan ya sa mu tambaya ko shan kofi da daddare zai iya rage wannan tasiri—duk da cewa binciken ya taƙaita ne ga beraye kawai, kuma adadin da aka bayar, kimanin mg 15‑25 a mutum, ba a tantance ba.
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