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, prevent constipation, decrease absorption of dietary cholesterol and thereby, lower plasma LDL cholesterol. Also, it helps protect from colon polyps and cancer. The fiber content aids in slow digestion starch and absorption of simple sugars in the gut. It helps in keeping blood sugar levels within the normal range and avoids wide fluctuations. For the same reason, potato is considered as reliable source of carbohydrates even in diabetics. They also contain adequate amounts of many essential minerals like Iron, manganese, magnesium, phosphorous, copper and potassium.
At home, they should be stored in cool, dry and dark place. Exposure to sunlight and excess moisture will cause potatoes to sprout and produce toxic solanine alkaloid.