IJapanese study: Sweet potatoes can kill 98% of cancer cells
National Institute for Cancer Prevention, JapanIn a study published in which researchers compared 20 kinds of vegetables with obvious tumor cell inhibition effects, the results found that sweet potatoes had the strongest anti-cancer rate. Among them,The cancer inhibition rate of cooked sweet potatoes reached 987% and 94% for raw sweet potatoes4%。
Since then, many people have eaten sweet potatoes in large quantities as a cancer-fighting vegetable. But in fact, this study is not rigorousThe subjects of the experiments are cells and animalsThe results obtained cannot act directly on the human body. And the sweet potato extract used in the experiment was usedThere is an essential difference between this and eating sweet potatoes directly, and it is obviously not feasible to rely on eating sweet potatoes to fight cancer every day.
Gu Chuanling, director of the Capital Health Nutrition and Gastronomy Society and registered nutritionistReminder, the so-called anti-cancer research of sweet potatoes is only based on animals and cells. There are also some clinical trials, but the clinical trials have the problem of small samples, and the use of sweet potato extract, these cannot conclude that sweet potatoes can fight cancer, so we should have the right attitude in this regard.
"Eating sweet potatoes often not only lowers blood sugar but also fights cancer, and there are many benefits!”As the weather cools down, the sweet potato stalls are crowded with people.
While the customer waited, the vendor explained: "Sweet potatoes are treasures all over the body, and Japanese scientists have studied that sweet potatoes have the strongest anti-cancer effectIt can destroy 98% of cancer cells. ”
IIEating sweet potatoes in winter, does it raise blood sugar or lower blood sugar?
Different people have different opinions on whether sweet potatoes are glycemic or hypoglycemic, some people think that sweet potatoes must be glycemic if they taste so sweet, and some people think that sweet potatoes are coarse grains must be hypoglycemicWhich statement is true?
If you want to judge whether a food is glycemic or not, you mainly use the GI value. Sweet potatoes have a GI of 77, which is a bit lower than rice's 80But both are foods with a high GI value. However, the type of sweet potato and the way it is cooked will affect the GI valueIt should be treated on a case-by-case basis.
The GI value of cooked sweet potatoes and cooled sweet potatoes will be about 20 years apartAmong them, boiled cooked sweet potatoes have a GI value of 767, exceeding the 70 standard line, belongs to the range of high GI foods, while the GI value of cool sweet potatoes is only 54.
The reason why sweet potatoes can lower blood sugar is because sweet potatoes contain less carbohydrates, only about 1 3 calories of rice, and are rich in pectin and fiberThese help to delay the absorption of sugar and fat in food, and the blood sugar will rise more slowly.
Diabetic patients can eat sweet potatoes appropriately every dayBut while eating sweet potatoes, pay attention to reducing the intake of staple foodsOtherwise, it is easy to cause a large increase in blood sugar after meals.
IIIHow to choose sweet potatoes of different colors?
There are many types of sweet potatoes on the marketRegistered dietitian Wu MeiIt said that sweet potatoes with different "hearts" also have differences in taste and nutritional value.
1.Red heart, yellow heart sweet potato
Sweet potatoes with red and yellow hearts are stickier and softer when cooked and have a sweet taste because of itWe have a high content of carotene. Carotene is good for protecting eyesight and eliminating some harmful substances in the body, which can help the body improve its resistance to a certain extent.
2.White-hearted sweet potato
Sweet potatoes with white hearts have less moisture and taste drier and creamier because of their insideHigh content of carbohydrates and soluble dietary fiberIt is good for lowering cholesterol, promoting gastrointestinal peristalsis, and preventing constipation.
3.Purple heart sweet potato
Purple sweet potatoThe content of anthocyanins and selenium is highIt has a strong antioxidant effect. In addition to these two elements, the polyphenols, lysine, flavonoids and other components in purple potatoes are also higher than other sweet potatoes, which can bring more health benefits.
Although the nutritional value of sweet potatoes is quite high, it is not recommended to eat more in daily life, because sweet potatoes are a food rich in dietary fiber, and a large amount of intake will lead to an increase in the burden on the gastrointestinal tract, which is easy to cause symptoms such as bloating, acid reflux, and heartburn. China's dietary guidelines recommend that the daily intake of potatoes should be maintained at 50 100g, and 100g of sweet potatoes is about the size of a woman's fist, so don't exceed this amount every day!