关于饮食的英语演讲Sugar_and_Fat.ppt

Diet Question special diet Sugar and Fat Carbohydrates (Sugars) Monosaccharides （单糖） Glucose（葡萄糖） Fructose（果糖）Galactose（半乳糖） Disaccharides （二糖） Maltose（麦芽糖） Sucrose（蔗糖） Lactose（乳糖） Polysaccharides （多糖） Starch（淀粉） Glycogen（糖原） Cellulose（纤维素） Sources of Carbohydrate Glucose Fruit Fructose Honey Sucrose Cane, Beet Lactose Milk Galactose Lactose Digestion Maltose Sprouting Grains Starch Grains, Unripe FV Glycogen Lver, Muscles Cellulose Cereals, Vegetables Unbalance of sugars Fat Fat = 2 × Carbohydrate Securing energy Two concepts Saturation （饱和度） Trans fat （反式脂肪） Saturation saturated fat （饱和脂肪） unsaturated fat （不饱和脂肪） × √ Trans fat Trans fat ×× Unsaturated fat 部分 partially 氢化 hydrogenate Trans fat Hydrogenated oil = Trans fat Why would companies do this? longer shelf life stay stable during deep frying taste better Good fats unsaturated fat bad fats saturated fats and trans fat Summary We eat too much of the monosaccharides and the disaccharides and we eat too little of the polysaccharides! There are good and bad fats! Thanks! * *