Sweet potatoes are highly nutritious, rich in dietary fiber, carotene, vitamins A, B, C, E, and minerals like potassium, iron, copper, selenium, and calcium. However, there's a right way to eat them for optimal health and nutrition. Here are the specific details.
Some people avoid sweet potatoes because they can cause flatulence. In fact, eating about 200 grams of sweet potato at a time generally won't lead to this problem. Combining sweet potatoes with rice or flour, and pairing them with pickles or vegetable soup can also prevent it. Compared to white-fleshed varieties, red-fleshed sweet potatoes are more nutritious. When buying, choose sweet potatoes with red flesh and a deeper color, as these are richer in carotene.
Experts say the greatest benefit of sweet potatoes is their ability to regulate the intestines. They contain soluble fiber and a large amount of gut flora, which aids in bowel movements and detoxification. Due to their low fat and calorie content, they can also be beneficial for weight loss and fitness. However, to eat sweet potatoes in a healthy and nutritious way, one must be mindful of how they are consumed.
1. Sweet potatoes should not be eaten raw. In some southern regions, it's a trend to eat them raw. Sweet potatoes are high in starch, which is difficult to digest when raw. It's best to cook them. High-temperature heating also makes soluble fiber easier to digest, shortens the sugar chains, and enhances the sweetness of the sweet potato.
2. Sweet potatoes should not be eaten alone. They should be paired with other grain foods. When eaten alone, their low protein content can lead to a nutritional imbalance. Therefore, the traditional method of cutting sweet potatoes into pieces and cooking them into a congee with rice is actually more scientific.
3. Sweet potatoes contain an oxidase enzyme that can produce a large amount of carbon dioxide gas in the human gastrointestinal tract. Eating too many sweet potatoes can cause bloating, belching, and flatulence. Sweet potatoes are also high in sugar; eating too much can stimulate the secretion of a large amount of stomach acid, leading to a "burning" sensation. The stomach contracts more strongly due to the excess acid, which can then flow back into the esophagus, causing acid reflux.
4. When eating sweet potatoes, it's best to pair them with a little pickled vegetable to effectively suppress stomach acid.
5. The sugar in sweet potatoes is more than the body can absorb at once. The remaining sugar can ferment in the intestines, causing abdominal discomfort. Traditional Chinese medicine suggests that individuals with "dampness obstructing the spleen and stomach" or "qi stagnation and food accumulation" should be cautious when eating sweet potatoes.
6. However, sweet potatoes also have their shortcomings. They lack protein and fat, so people should not treat them as a staple food. It's best to eat them with other dishes.
Dietary Taboos for Sweet Potatoes
Sweet potatoes should not be eaten with persimmons: Sweet potatoes and persimmons should not be consumed at the same time within a short period. If large amounts are eaten, there should be an interval of at least five hours. If eaten together, the sugar in the sweet potato ferments in the stomach, increasing stomach acid secretion. This reacts with the tannins and pectin in the persimmon, causing a precipitate to form. A large amount of this can lead to gastrointestinal bleeding or a stomach ulcer. If you feel discomfort in your stomach, you must go to the hospital for an endoscopy to check for bleeding or ulcers.
Do not overeat sweet potatoes: Sweet potatoes contain an oxidase enzyme that can produce a large amount of carbon dioxide gas in the gastrointestinal tract. Eating too many can cause bloating, belching, and flatulence. Sweet potatoes are high in sugar; eating too much can produce a large amount of stomach acid, leading to a "burning" sensation. The stomach contracts more strongly due to the acid, causing the cardiac sphincter muscle (where the stomach and esophagus meet) to relax. This allows stomach acid to flow back into the esophagus, resulting in acid reflux. Excess sugar that the body cannot absorb ferments in the intestines, also causing stomach discomfort.
Therefore, the popular sweet potato health trend is not suitable for everyone. If you experience diarrhea after eating them, it's best to stop and switch to brown rice, which can have similar health benefits.
When is the best time to eat sweet potatoes for health?
Stir-fried Sweet Potato Leaves
Sweet potatoes lack protein and fat, so they should be eaten with vegetables, fruits, and protein-rich foods to avoid nutritional imbalance. Most importantly, sweet potatoes are best eaten at lunch. This is because the calcium in sweet potatoes takes 4 to 5 hours to be absorbed by the body, and the afternoon sunlight can promote calcium absorption. By eating sweet potatoes at lunch, the calcium can be fully absorbed before dinner, so it doesn't interfere with the calcium absorption from other foods eaten at dinner.
Not only are sweet potatoes nutritious, but sweet potato leaves are also edible and have specific ways of being prepared. Sweet potato leaves are the tender leaves from the top of the plant's vines after the sweet potatoes have matured. The Asian Vegetable Research and Development Center has classified sweet potato leaves as a high-nutrient vegetable, calling them the "Queen of Vegetables." In recent years, a "sweet potato leaf trend" has emerged in Japan, Europe, America, and other regions.
There are two main ways to eat sweet potato leaves: The first is to select fresh, tender leaf tips, blanch them in boiling water, and then dress them with sesame oil, soy sauce, vinegar, chili oil, ginger juice, and other seasonings to make a cold salad. The appearance is tender green and whets the appetite. The second is to stir-fry them like vegetables such as romaine lettuce or water spinach, which is fragrant, sweet, and has a unique flavor. It is speculated that sweet potato leaves have not been developed in China, possibly due to people's perceptions and the level of preservation technology. Abroad, freeze-drying technology is generally used, which increases the cost of the vegetable.
Hot potato leaves