Administration of theanine, a unique amino acid in tea leaves, changed feeding-relating components in serum and feeding behavior in rats.
We identified an effect of gamma-glutamylethylamide (theanine) on feeding in a rat study. Oral theanine suppressed the food intake of rats. The serum glucose level did not differ from the control, but the insulin concentration was reduced and the corticosterone concentration was increased by theanine. We suggest that the effect of theanine on feeding involved hormones.
Yamada
Takashi
T
COE Program in the 21st Century and Cooperation of Innovative Technology and Advanced Research in the Evolutional Area (CITY AREA), University of Shizuoka, Japan.
Nishimura
Yuko
Y
Sakurai
Takumi
T
Terashima
Takehiko
T
Okubo
Tsutomu
T
Juneja
Lekh Raj
LR
Yokogoshi
Hidehiko
H
D000818:Animals; D019440:Anti-Obesity Agents / Q000494:pharmacology; D001786:Blood Glucose / Q000378:metabolism; D003345:Corticosterone / Q000097:blood; D004837:Epinephrine / Q000652:urine; D005247:Feeding Behavior / Q000187:drug effects*; D005951:Glucose Tolerance Test; D005971:Glutamates / Q000008:administration & dosage / Q000494:pharmacology*; D007328:Insulin / Q000097:blood; D008297:Male; D009638:Norepinephrine / Q000652:urine; D018515:Plant Leaves / Q000737:chemistry*; D051381:Rats; D017208:Rats, Wistar; D013662:Tea / Q000737:chemistry*
D019440:Anti-Obesity Agents; D001786:Blood Glucose; D005971:Glutamates; D007328:Insulin; D013662:Tea; C026166:theanine; D003345:Corticosterone; D009638:Norepinephrine; D004837:Epinephrine