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脑力劳动者的营养脑力劳动者一般肌肉活动少,主要从事脑力劳动。怎样通过食物营养提高大脑的劳动效率,这是每个脑力劳动者关心的问题。科学家研究发现,人脑的重量虽然只占人体重量的2%左右,但大脑消耗的能量却占全身能量消耗的20%。人体消耗的能量主要由膳食中的糖、脂肪和蛋白质提供。但人脑在利用能源物质上与其他器官不同,它主要依靠血液中的葡萄糖(血糖)氧化供给能量。大脑对血糖极为敏感,人脑每天大约需要116-145克的糖,当血糖浓度降低时,脑的耗氧量也会随之下降,轻者感到头昏、疲倦,重者则会
Mental nutrition of mental workers generally less muscle activity, mainly engaged in mental work. How to improve the efficiency of the brain through food nutrition, which is the concern of every mental worker. Scientists found that although the human brain weighs only about 2% of body weight, but the brain’s energy consumption accounts for 20% of total body energy consumption. The energy consumed by the body is mainly provided by the dietary sugars, fats and proteins. However, the human brain is different from other organs in the use of energy substances. It relies mainly on the oxidation of glucose (blood sugar) in the blood to supply energy. The brain is extremely sensitive to blood sugar, the human brain needs about 116-145 grams of sugar a day, when the blood glucose concentration decreases, the brain’s oxygen consumption will decline, the light felt dizzy, tired, heavy will be