现代人吃东西越来越讲究,卡路里成了很多人最看重的食品标签。卡路里原本是个物理学名词,1卡路里相当于1克纯水提升1℃所需要的能量。食品科学领域喜欢用“千卡”这个单位,这样便于计算。三大营养物质当中,碳水化合物和蛋白质每克大约可以产生4千卡的能量,脂肪的能量密度则要大得多,每克脂肪可以产生大约9千卡的能量,这就是为什么人体将大部分多余的能量储存 More and more people pay attention to modern food, calories have become the most valued food labels of many people. Calories were originally a physics term, a calorie equivalent to 1 gram of water to enhance the energy required 1 ℃. Food Science like to use “Kcal ” this unit, so easy to calculate. Of the three nutrients, carbohydrates and protein can produce about 4 kcal per gram, and the energy density of fat is much greater, producing about 9 kilocalories per gram of fat, which is why most of the body Excess energy storage