Purple potatoes have some water, carotene, minerals and other nutrients, moderate intake can supplement some of the nutrients needed by the body. In general, every 100g of purple potatoes contain 446KJ of energy, but also contains 73.4g of water and 750.0mg of carotene, eaten in moderation can provide the body with some energy, replenishment of some of the nutrients needed to a certain extent to maintain normal life activities. In the diet also need to pay attention to not recommended to eat too much, if a short period of time excessive consumption of purple potatoes, may stimulate the gastrointestinal tract, causing abdominal pain, diarrhea and other uncomfortable symptoms. Secondly, the diet also needs to be diversified, daily life also need to choose to eat some fresh vegetables, fruits, meat, etc., can ensure that the human body to take in a full range of nutrients, to avoid a single diet caused by malnutrition.