大脑所需要的营养物质很多,基本的有水、蛋白质、脂类、糖类、维生素及微量元素等,下面作分别介绍。 1.水分 水占脑总量的70％,一旦缺乏水分,脑的机能就会受到严重的伤害,因此对水的摄取绝对不能忽视,一般每天约需3升水。这个量虽然在每天的饮食中能充分获得,但有关专家还是建议,再额外多喝些水,有益无害。 2.糖类 糖类在机体中能转化为大量的热量,供给并保证大脑的能量。从食物中摄取的糖类,在体内是先分解成葡 The brain needs a lot of nutrients, the basic water, protein, lipids, carbohydrates, vitamins and trace elements, the following were introduced. 1. Water accounts for 70% of the total brain, once the lack of water, brain function will be severely damaged, so the water intake must not be ignored, usually about 3 liters of water a day. Although this amount can be fully obtained in the daily diet, the experts still suggest that it is beneficial and harmless to drink more water. Sugar carbohydrates in the body can be converted into a lot of heat, supply and ensure the brain’s energy. Sugar taken from food, in the body is first broken down into the Portuguese