Potatoes are one of the finest sources of starch, vitamins, minerals and dietary fiber. 100 g provides 70 calories, however, they contain very little fat (just 0.1 g per100 g) and no cholesterol.
They are very good natural sources of both soluble and insoluble fiber. The dietary fiber in them increases the bulk of the stool, thus, it helps prevent constipation, decrease absorption of dietary cholesterol and thereby, lower plasma LDL cholesterol. Additionally, its rich fiber content also helps protect from colon polyps and cancer.
The fiber content aids in slow digestion starch and absorption of simple sugars in the gut. It thus helps in keeping blood sugar levels within the normal range and avoid wide fluctuations. For the same reason, potato is considered as reliable source of carbohydrates even in diabetics.
The tubers are one of the richest sources of B-complex group of vitamins such as pyridoxine (vitamin B6), thiamin, niacin, pantothenic acid and folates.
Fresh potato along with its skin is one of a good source of antioxidant vitamin, vitamin-C. 100 g of fresh tuber provides 11.4 mg or 20% of daily required levels of this vitamin. Regular consumption of foods rich in vitamin-C helps body develop resistance against infectious agents and scavenge harmful, pro-inflammatory free radicals.
They also contain adequate amounts of many essential minerals like Iron, manganese, magnesium, phosphorous, copper and potassium.