... alimentary canal. To prevent colon cancer. Introduction:The potato contains vitamins, minerals and protein, as well as ... Chlorogenic acid constitutes up to 90% of the potato tuber natural phenols. Others found in potatoes are 4 ... A medium-size 150 g (5.3 oz) potato with the skin provides 27 mg of vitamin C ... , iron, and zinc. The fiber content of a potato with skin (2 g) is equivalent to that of ...