据研究:
养生甘薯含有丰富的淀粉、维生素、纤维素等人体必需的营养成分,还含有丰富的镁、磷、钙等微量元素和亚油酸等。这些物质能保持血管弹性,对防治老年习惯性便秘十分有效。
遗憾的是,人们大都以为,经常食用甘薯会使人发胖,因而不敢食用。其实,恰恰相反,甘薯是一种老幼皆宜的理想减肥食品,它的热量只有大米的1/3,而且因其富含纤维素和果胶而具有阻止糖分转化为脂肪的特殊功能。甘薯中还含有一种类似雌性激素的物质,对保护人体皮肤,
延缓衰老有一定的作用。因此,国外许多女性把甘薯当作 驻颜美容食品。
美国公共利益科学中心推荐甘薯为第一营养食品
原文来自:http://www.foodreference.com/html/sweet-pot-nutrition.html
SWEET POTATO NUTRITION
Sweet Potato Ranks Number One In Nutrition
According to nutritionists at the Center for Science in the Public Interest (CSPI), the single most important dietary change for most people, including children, would be to replace fatty foods with foods rich in complex carbohydrates, such as sweet potatoes.
CSPI ranked the sweet potato number one in nutrition of all vegetables. With a score of 184, the sweet potato outscored the next highest vegetable by more than 100 points. Points were given for content of dietary fiber, naturally occurring sugars and complex carbohydrates, protein, vitamins A and C, iron and calcium. Points were deducted for fat content (especially saturated fat), sodium, cholesterol, added refined sugars and caffeine. The higher the score, the more nutritious the food.
Sweet potato baked 184
Potato, baked 83
Spinach 76
Kale 55
Mixed Vegetables 52
Broccoli 52
Winter Squash, Baked 44
Brussels Sprouts 37
Cabbage, Raw 34
Green Peas 33
Carrot 30
Okra 30
Corn on the Cob 27
Tomato 27
Green Pepper 26
Cauliflower 25
Artichoke 24
Romaine Lettuce 24
Sweet Potato Nutrition Facts(甘薯营养成份含量)
(for one medium size sweet potato)
Calories 130
Fat 0.39 g
Protein 2.15 g
Net Carbs 31.56 g
Dietary Fiber 3.9 g
Calcium 28.6 mg
Sodium 16.9 mg
Potassium 265.2 mg
Folate 18.2 mcg
Vitamin C 29.51 mg
Vitamin A 26081.9 IU
Source: US Department of Agriculture(来源: 美国农业部门)
Among root vegetables, sweet potatoes offer the lowest glycemic index rating. That’s because the sweet potato digests slowly, causing a gradual rise in blood sugar so you feel satisfied longer. It’s time to move sweet potatoes to the "good" carb list. Many of the most popular diets these days have already.