Ito En, Ltd.

Toshio Kawasaki

Yuko Sagesaka

Masami Sasame

Hitoshi Kinugasa

Takami Kakuda

Takanobu Takihara

Kenji Shimaoka

Hitoshi Niino

Nobuo Matsumoto

Takanobu Matsuura

Takashi Yamamoto

Tea leaves are extracted in warm or hot water, and the obtained extract is contacted with a cation exchange resin ionically bonded to potassium ion. The potassium ion is ionically bonded to the cation exchange resin in advance. Divalent ions in the tea beverage are replaced with the potassium ions from the cation exchange resin. The electrical conductivity of the extract is controlled in this whole process. The natural flavor and quality of the tea are thereby maintained more certainly, since metal ions that cause muddiness or precipitation are effectively removed.

Tea manufacturing process

The caffeine stimulation inhibitor that inhibits stimulation by combining the use of theanine extracted from tea leaves and/or a substance having theanine for its major active ingredient which is produced by extracting tea leaves with a solvent such as water, hot water or ethanol, chemical synthesis, microbial fermentation or plant tissue culturing. These active ingredients are able to inhibit the stimulatory action of caffeine without degrading the quality, such as the flavor and aroma, of caffeine-containing beverages and foods, allowing persons hypersensitive to caffeine to consume caffeine-containing beverages and foods without worry over its effects.

Product and method for inhibiting caffeine stimulation with theanine

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Tokyo, Japan

Toshio Kawasaki