Sweet potatoes, also known as yams, white potatoes, sweet potatoes, and red potatoes, contain dietary fiber, carotene, vitamins A, B, C, E, and more than 10 trace elements such as potassium, iron, copper, selenium, and calcium. They are called the most balanced health food by nutritionists and selected by the World Health Organization as the healthiest food, ranking first among the 13 best vegetables.
Not only are sweet potatoes rich in nutrition, but they also have a powerful anti-cancer effect, ranking first among anti-cancer foods. In 1995, an American biologist discovered that sweet potatoes contain a chemical substance called dehydroepiandrosterone, which can be used to prevent colon cancer and breast cancer. In 1996, the National Cancer Center Research Institute of Japan conducted a statistical survey on the relationship between the diet and lifestyle of 260,000 people and cancer, and ranked 20 vegetables with a significant inhibitory effect on cancer. Cooked sweet potatoes ranked first, and raw sweet potatoes ranked second, which shows the anti-cancer power of sweet potatoes.