綠茶之兒茶素類於健康上之影響

The Health Effect in Catechins of Green Tea

10.30001/JIES.200508.0005

呂兆倉；林青玫；鄭富元

自由基 ； 兒茶素類 ； 抗氧化劑 ； 低密度脂蛋白 ； 三酸甘油酯 ； 膽固醇

美容科技學刊

2卷2期（2005 / 08 / 01）

47 - 59

繁體中文

癌症及心血管疾病己連續好幾年名列國人十大死因內，因此如何預防及降低罹患癌症及心血管疾病的風險，已是非常迫切與近身的問題。人體代謝食物產生能量的同時，大量的自由基會伴隨產生，體內雖有去除自由基的機制，但往往無法讓生成與去除達到平衡，而會有多餘自由基殘存下來，因自由基具有極強的氧化能力，會破壞細胞組織，進而造成癌症及心血管疾病。抗氧化劑因具有抗氧化能力，可有效去除自由基，進而達到預防或降低罹患癌症及心血管疾病的風險。綠茶中之兒茶素類具有抗氧化能力，已被視為是一種抗氧化劑，經由動物實驗證明，它可抑制各種癌細胞的生長、增加抗氧化酵素的活性、間接保護低密度脂蛋白不被氧化、可減少對三酸甘油酯及膽固醇的吸收並降低其在血漿中之濃度、可減低血清中葡萄糖的濃度、可回復腎臟中thromboxane A2 及prostacyclin I2的原來正常比例，進而降低血栓形成的機率。兒茶素類對人體的影響之相關研究較不多見，但從一些流行病墨的調查顯示，多喝綠茶是可降低罹患各種癌症的風險。

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1. 鄭富元、林青玫、呂兆倉(2006)。植物抗氧化劑於癌症上之應用。美容科技學刊，3(1)，123-135。