白薯学名甘薯。它的最大特点就是供给人体大量的粘液蛋白——这是一种胶原和粘液多糖类物质,厲于一种多糖蛋白质的混合物,对人体有特殊的保护作用。它能预防心血管系统脂肪沉着,保持动脉血管壁的弹性,防止动脉粥样硬化的发生,并使皮下脂肪减少,避免出现过度肥胖。它还能防止肝脏和肾脏中结缔组织萎缩,预防胶原病的发生,保持消化道、呼吸道以及关节腔和浆膜腔的润滑。此外,胶原和粘液多糖类物质与无机盐类结合可以形成骨质,并使软骨具有一定的弹性。现今日本很重视对做白薯为长寿食品的研究;而我国明代李时珍早已把白薯列为长寿食品了。 Sweet potato sweet potato. Its greatest feature is the supply of a large number of human mucus protein - which is a collagen and mucopolysaccharide, a mixture of polysaccharide protein, has a special protective effect on the human body. It can prevent cardiovascular system fat deposits, maintain the elasticity of the arterial wall, prevent atherosclerosis and reduce subcutaneous fat, to avoid over-obesity. It also prevents connective tissue atrophy in the liver and kidneys, prevents the onset of collagen disease, and maintains lubrication of the digestive tract, the respiratory tract, and the articular and serosal cavities. In addition, collagen and mucopolysaccharides combined with inorganic salts can form bone, and cartilage has a certain elasticity. At present, Japan attaches great importance to the research on making sweet potatoes as longevity food; while in China, Li Shizhen has already listed sweet potatoes as longevity food.