One reason may be breakfast's nutritional value partly because cereal is fortified with vitamins.
2019年12月四级真题（第三套）阅读 Section B
This was accomplished through the dark green packaging that not only differed from the competitors, but also suggested freshness and richness in vitamins.
2015年12月四级真题（第二套）听力 Section C
英语六级真题
They believe such a diet which includes no products from animal sources can be deficient in many of the necessary vitamins and minerals our bodies need.
出自-2013年6月听力原文
It lacks the vitamins and minerals essential for health
出自-2013年6月听力原文
In the observational studies we found that some of the B vitamins were beneficial.
2016年6月六级真题（第二套）听力 Section C
柯林斯高阶英汉双解学习词典释义
N-COUNT
维生素;维他命
Vitamins are substances that you need in order to remain healthy, which are found in food or can be eaten in the form of pills.