... prevent colon cancer. Introduction:The potato contains vitamins, minerals and protein, as well as an assortment of phytochemicals, such as carotenoids ... acid), 3,4-dicaffeoylquinic and 3,5-dicaffeoylquinic acids.[56] A medium-size 150 g (5.3 oz) potato with the ... , niacin, magnesium, phosphorus, iron, and zinc. The fiber content of a potato with skin (2 g) is equivalent to that of ...