Effects of timing of acute catechin-rich green tea ingestion on postprandial glucose metabolism in healthy men

Masaki Takahashi*, Mamiho Ozaki, Masashi Miyashita, Mayuko Fukazawa, Takashi Nakaoka, Takuya Wakisaka, Yuji Matsui, Masanobu Hibi, Noriko Osaki, Shigenobu Shibata

*この研究の対応する著者

研究成果: Article査読

12 被引用数 (Scopus)

抄録

Green tea polyphenols, particularly catechins, decrease fasting and postprandial glucose. However, no studies have compared the timing of green tea ingestion on glucose metabolism and changes in catechin concentrations. Here, we examined the effects of timing of acute catechin-rich green tea ingestion on postprandial glucose metabolism in young men. Seventeen healthy young men completed four trials involving blood collection in a fasting state and at 30, 60, 120, and 180 min after meal consumption in a random order: 1) morning placebo trial (09:00 h; MP trial), 2) evening placebo trial (17:00 h; EP trial), 3) morning catechin-rich green tea trial (09:00 h; MGT trial), and 4) evening catechin-rich green tea trial (17:00 h; EGT trial). The concentrations of glucose at 120 min (P=.031) and 180 min (P=.013) after meal intake were significantly higher in the MGT trials than in the MP trials. Additionally, the concentration of glucose was significantly lower in EGT trials than in the EP trials at 60 min (P=.014). Moreover, the concentrations of glucose-dependent insulinotropic polypeptide were significantly lower in the green tea trials than in the placebo trials at 30 min (morning: P=.010, evening: P=.006) and 60 min (morning: P=.001, evening: P=.006) after meal intake in both the morning and evening trials. Our study demonstrated that acute ingestion of catechin-rich green tea in the evening reduced postprandial plasma glucose concentrations.

本文言語English
論文番号108221
ジャーナルJournal of Nutritional Biochemistry
73
DOI
出版ステータスPublished - 2019 11

ASJC Scopus subject areas

  • 内分泌学、糖尿病および代謝内科学
  • 生化学
  • 分子生物学
  • 栄養および糖尿病
  • 臨床生化学

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