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Titolo:
L-theanine - a unique amino acid of green tea and its relaxation effect inhumans
Autore:
Juneja, LR; Chu, DC; Okubo, T; Nagato, Y; Yokogoshi, H;
Indirizzi:
Taiyo Kagaku Co Ltd, Nutr Foods Div, Yokkaichi 5100844, Japan Taiyo KagakuCo Ltd Yokkaichi Japan 5100844 iv, Yokkaichi 5100844, Japan Univ Shizouka, Sch Food & Nutr Sci, Lab Nutr Biochem, Shizouka 4228526, Japan Univ Shizouka Shizouka Japan 4228526 tr Biochem, Shizouka 4228526, Japan
Titolo Testata:
TRENDS IN FOOD SCIENCE & TECHNOLOGY
fascicolo: 6-7, volume: 10, anno: 1999,
pagine: 199 - 204
SICI:
0924-2244(199906/07)10:6-7<199:L-AUAA>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPONTANEOUSLY HYPERTENSIVE RATS; BLOOD-PRESSURE; CAMELLIA-SINENSIS; REDUCTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Juneja, LR Taiyo Kagaku Co Ltd, Nutr Foods Div, 1-3 Takaramachi, Yokkaichi5100844, Japan Taiyo Kagaku Co Ltd 1-3 Takaramachi Yokkaichi Japan 5100844 an
Citazione:
L.R. Juneja et al., "L-theanine - a unique amino acid of green tea and its relaxation effect inhumans", TRENDS FOOD, 10(6-7), 1999, pp. 199-204

Abstract

Since ancient times, it has been said that drinking green tea brings relaxation. The substance that is responsible for a sense of relaxation, is theanine. Theanine is a unique amino acid found almost solely in tea plants andthe main component responsible for the exotic taste of 'green' tea. It wasfound that L-theanine administered intraperitoneally to rats reached the brain within 30 min without any metabolic change. Theanine also acts as a neurotransmitter in the brain and decreased blood pressure significantly in hypertensive rats. In general, animals always generate very weak electric pulses on the surface of the brain, called brain waves. Brain waves are classified into four types, namely alpha, beta, delta and theta-waves, based on mental conditions. Generation of alpha-waves is considered to be an index of relaxation. In human volunteers, ar-waves were generated on the occipitaland parietal regions of the brain surface within 40 min after the oral administration of theanine (50-200 mg), signifying relaxation without causing drowsiness. With the successful industrial production of L-theanine, we arenow able to supply Suntheanine(TM) (trade name of L-theanine) which offersa tremendous opportunity for designing foods and medical foods targeting relaxation and the reduction of stress. Taiyo Kagaku Co., Ltd, Japan won the1998 'Food Ingredient Research Award' for development of Suntheanine(TM) at Food Ingredients in Europe (Frankfurt). The judges felt it was a particularly well-documented and fascinating piece of research. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 09:12:49