Laboratory experiments suggest that one group of polyphenols in green tea called catechins may inhibit the growth of new blood vessels, which some scientists think may help prevent cancer by depriving early tumors of nourishment.

• 试验表明,绿茶中一组被称为儿茶酚的多酚物质可能阻止新生血管的生长。 一些科学家认为,这一特性可能有助于断绝初期肿瘤的营养来源,从而预防癌症。