Weight Gain: Potatoes are primarily made of carbohydrates and contain very little protein. This makes it an ideal diet for those excessively lean or thin people who desperately want to put on weight. The vitamin content includes vitamin-C and B-complex, which also help in proper absorption of carbohydrates. That is one of the reasons that potatoes make up a large part of the diet of sumo wrestlers, as well as many other athletes who need large energy reserves to burn off in order to compete!
Digestion: Since potatoes predominantly contain carbohydrates, they are easy to digest and facilitate digestion. This property makes them a good diet for babies or for those who cannot digest hard food, but need energy. However, remember that eating too many potatoes on a regular basis may cause acidity over time. Potatoes also contain a considerable amount of fiber or roughage, more in raw potatoes and cold ones than boiled or hot ones. This stimulates peristaltic motion and increased secretion of gastric juices, which eases digestion and prevents conditions like constipation and protects the body from more serious conditions like colorectal cancer. Fiber is also connected with scraping cholesterol out of the arteries and blood vessels, thereby increasing heart health.
Skin Care: Vitamin-C and B-complex as well as minerals like potassium, magnesium, phosphorus and zinc are good for the skin. Apart from that, pulp obtained from crushed raw potatoes, mixed with honey, can work well in skin and face packs. This even helps to cure pimples and spots on the skin. Again, this pulp, if applied externally on burns, provides quick relief and faster healing. Smashed potatoes, and even water in which potatoes have been washed, are very good for softening and cleaning skin, especially around the elbows, and the back of the hands.
Scurvy: The vitamin-C present in potatoes can help prevent this disease, caused by a deficiency of vitamin-C. It is characterized by cracked lip corners, spongy and bleeding gums, and frequent viral infections. Although it has been eliminated from most first and second world countries with ready access to vitamin C, it still exists in certain nations of the world, so the prolific presence of potatoes in the world helps with this problem.