In the “Chinese Food Composition Table”, 100 grams of fresh sweet potatoes have 102 kacl of heat, and 100 g of steamed rice has 116 kcal of calories, which means that sweet potatoes can be used to fill their stomachs when rice is not enough to eat. Sweet potatoes are easy to grow, grow fast, and are often used as food for famine relief since ancient times. Because of this, eating sweet potatoes and other potatoes is seen by many as a symbol of poverty. Once life is good, people are no longer willing to touch them. Therefore, its nutritional value is often overlooked.

However, with the popularization of science and culture and the improvement of people’s awareness, the status of sweet potato’s health value is undergoing a tremendous transformation. It is not only rich in nutritional value, but also a longevity fruit. Next, let’s take a look at sweet potatoes. What are the longevity codes?

First, wide bowel movements. Sweet potato contains very rich "soft" dietary fiber. The reason why it is "soft" is because the dietary fiber contained in sweet potato has stronger binding and hydration power than the other three dietary fibers (potato, soybean meal, wheat bran, etc.) Dietary fiber is high, so it is easily digested and absorbed by the body. At the same time, it can promote the removal of harmful substances from the intestines in a timely manner, thereby reducing the absorption of harmful substances. Moreover, after the sweet potato has been steamed, part of the starch is changed, and the dietary fiber is increased by about 40% compared with the raw food. Can effectively stimulate the intestinal peristalsis and promote bowel movements.

Second, enhance immune function. Sweet potato contains a large amount of mucin, which can prevent the atrophy of the connective tissue of the liver and kidney and improve the body's immune system.

Third, prevention of cancer and cancer. The rich antioxidant substances contained in sweet potatoes, such as vitamin C and beta carotene, can play a role in eliminating active oxygen, which is one of the causes of cancer induction. In addition, the rich dietary fiber of sweet potato can promote intestinal health and indirectly prevent and treat colon cancer.

Sweet potato is the only potato food that contains vitamin C in the starchy staple food. The β-carotene content of sweet potato is also the most abundant nutrient in potato and starch. Beta-carotene is a good anti-oxidant substance, and its content is different so that the sweet potato shows different colors. The more β-carotene, the darker the color of sweet potatoes. Different color sweet potatoes have different antioxidant abilities. In general, the darker the color, the stronger the antioxidant capacity.

Fourth, anti-aging and prevention of hypertension. Sweet potato contains a special substance called chlorogenic acid, which can inhibit the production of melanin, prevent the appearance of freckles and senile plaques, and delay cell aging. In addition, the potassium content of sweet potatoes is higher than that of apple oranges, and high potassium and low sodium can regulate the balance of water and electrolytes, which is beneficial to the prevention and alleviation of hypertension.

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