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Document Type and Number:
WIPO Patent Application WO/2014/065369
Kind Code:
The purpose of the present invention is to provide a tea leaf extract rich in high-stability anthocyanin and exceptional palatability. Specifically, the present invention provides a tea leaf extract containing, with respect to the dry weight of the tea leaf extract, at least 0.13% by weight of delphinidin or a glycoside thereof and no more than 23.0% by weight of a catechin; a method for manufacturing the tea leaf extract in which extraction is performed on the tea leaves using water in a volume of no less than 10 times the dry weight of the tea leaves at a temperature of 70 to 95°C and a time of 5 to 60 minutes; a beverage/foodstuff containing the tea leaf extract or composition; and a use for said beverage/foodstuff.

KAWAGUCHI, Fumiki (Ochanomizu sola city, 4-6, Kandasurugadai, Chiyoda-k, Tokyo 62, 〒1010062, JP)
SUGITA, Koichi (Ochanomizu sola city, 4-6, Kandasurugadai, Chiyoda-k, Tokyo 62, 〒1010062, JP)
MURAKAMI, Akira (Ochanomizu sola city, 4-6, Kandasurugadai, Chiyoda-k, Tokyo 62, 〒1010062, JP)
NAKAHAMA, Katsuhiko (NIPPON PAPER INDUSTRIES CO. LTD., 21-1, Oji 5-chome, Kita-k, Tokyo 02, 〒1140002, JP)
NANTO, Kazuya (NIPPON PAPER INDUSTRIES CO. LTD., 21-1, Oji 5-chome, Kita-k, Tokyo 02, 〒1140002, JP)
KAWAOKA, Akiyoshi (NIPPON PAPER INDUSTRIES CO. LTD., 21-1, Oji 5-chome, Kita-k, Tokyo 02, 〒1140002, JP)
YAMAMOTO, Mari (2-1-12 Kannondai, Tsukuba-sh, Ibaraki 42, 〒3058642, JP)
Application Number:
Publication Date:
May 01, 2014
Filing Date:
October 24, 2013
Export Citation:
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NIPPON PAPER INDUSTRIES CO., LTD. (4-1 Oji 1-chome, Kita-ku Tokyo, 02, 〒1140002, JP)
International Classes:
A61K36/18; A23F3/16; A23L1/30; A23L2/52; A61K8/49; A61K8/97; A61P27/02; A61P29/00; A61P39/06
Domestic Patent References:
Foreign References:
Other References:
TAKESHI SAITO ET AL.: "Shinki Cha Hinshu 'Sun Rouge' ni Fukumareru Anthocyanin no Kaiseki", JAPAN SOCIETY FOR BIOSCIENCE, BIOTECHNOLOGY, AND AGROCHEMISTRY TAIKAI KOEN YOSHISHU, vol. 2011, 2011, pages 24
BERTUGLIA S ET AL.: "Effects of the Natural Flavonoid Delphinidin on Diabetic Microangiopathy.", ARZNEIM FORSCH, vol. 45, no. 4, 1995, pages 481 - 485
GEETHA B S ET AL.: "Hypoglycemic effects of Leucodelphinidin derivative isolated from Ficus bengalensis(Linn.).", INDIAN J PHYSIOL PHARMACOL, vol. 38, no. 3, 1994, pages 220 - 222
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Attorney, Agent or Firm:
SAKAI, Hiroaki (Sakai International Patent Office, Kasumigaseki Building 2-5, Kasumigaseki 3-chome, Chiyoda-k, Tokyo 20, 〒1006020, JP)
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