Vitaminsandotherfoodsupplements（taken）bymillionsofwomenmayactuallyputthematmorerisk.括号中的taken,是被动么,为什么没有be动词?请详细解释此类语法内容

Question

Vitamins and other food supplements（ taken ）by millions of women may actually put them at more risk.
括号中的taken ,是被动么,为什么没有be动词?
请详细解释此类语法内容

Answer 1

Vitamins and other food supplements taken by millions of women 主语
taken by millions of women 是 Vitamins and other food supplements的定语
分词成分做定语不是谓语所以不必加be
taken 在这里是被吃的意思
过去分词短语作后置定语时,通常放在被修饰的名词之后,它的作用相当于一个定语从句.如:
This will be the best novel of its kind ever written (=that has ever been written).
这将是这类小说中写得最好的.