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Effect of tea catechins on postprandial plasma lipid responses in human subjects

Published online by Cambridge University Press:  08 March 2007

Tomonori Unno ,
Motomi Tago ,
Yuko Suzuki ,
Ayumu Nozawa ,
Yuko M Sagesaka ,
Takami Kakuda ,
Kazutada Egawa  and
Kazuo Kondo
Tomonori Unno*
Affiliation:
Central Research Institute, ITO EN, Ltd., 21 Mekami, Sagara-cho, Haibara-gun, Shizuoka, 421-0516, Japan
Motomi Tago
Affiliation:
Institute of Environmental Science for Human Life, Ochanomizu University, 2-1-1 Ohtsuka, Bunkyo-ku, Tokyo, 112-8610, Japan
Yuko Suzuki
Affiliation:
Central Research Institute, ITO EN, Ltd., 21 Mekami, Sagara-cho, Haibara-gun, Shizuoka, 421-0516, Japan
Ayumu Nozawa
Affiliation:
Central Research Institute, ITO EN, Ltd., 21 Mekami, Sagara-cho, Haibara-gun, Shizuoka, 421-0516, Japan
Yuko M Sagesaka
Affiliation:
Central Research Institute, ITO EN, Ltd., 21 Mekami, Sagara-cho, Haibara-gun, Shizuoka, 421-0516, Japan
Takami Kakuda
Affiliation:
Central Research Institute, ITO EN, Ltd., 21 Mekami, Sagara-cho, Haibara-gun, Shizuoka, 421-0516, Japan
Kazutada Egawa
Affiliation:
Nihonbashi Egawa Clinic, 1-1-3 Yaesu, Chuo-ku, Tokyo, 103-0028, Japan
Kazuo Kondo
Affiliation:
Institute of Environmental Science for Human Life, Ochanomizu University, 2-1-1 Ohtsuka, Bunkyo-ku, Tokyo, 112-8610, Japan
*
*Corresponding author: Dr Tomonori Unno, fax +81 548 54 0763, email t-unno@itoen.co.jp
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Abstract

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Epidemiological surveys suggest that a higher intake of tea may be associated with a lower risk of CHD. There is accumulating evidence that postprandial lipaemia makes a substantial contribution to the incidence of CHD. Our aim was, therefore, to evaluate the effect of tea catechins (major ingredients in green tea) on postprandial lipid responses in human subjects after the consumption of test meals. In a randomized triple-crossover design, nine male subjects with mild or borderline hypertriacylglycerolaemia consumed 10 (control), 224 (moderate dose) and 674 mg (high dose) of the assigned tea catechins three times each along with a standardized light meal consisting of a piece of bread spread with 20 g butter. Plasma lipids were measured in the fasting state and 1, 2, 3, 4 and 6 h after consuming the light meal. Results showed that, compared with the control, moderate and high doses of tea catechins reduced the incremental area under the plasma triacylglycerol curves by 15·1 and 28·7 %, respectively. Next, the rapid elevation of remnant-like particle cholesterol was significantly inhibited by a high dose of tea catechins 2 h after consuming the light meal (P<0·01). In the range of tea catechin dosages, no significant differences were observed in the postprandial responses for plasma total cholesterol or NEFA at any time point. In conclusion, this trial demonstrated that tea catechins attenuated the postprandial increase in plasma triacylglycerol levels following a fat load. These results may provide evidence for one of the possible mechanisms involved in lowering the incidence of CVD, and may prove useful in further studies on the beneficial health effects of tea drinking.

Keywords

Tea catechinsTriacylglycerolsRemnant lipoproteinPostprandial lipaemia
Type
Research Article
Information
British Journal of Nutrition , Volume 93 , Issue 4 , April 2005 , pp. 543 - 547
Copyright
Copyright © The Nutrition Society 2005

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