推荐回答(4个)
一提到坚果,就一定要说说核桃,这核桃吃起来很香,营养更是非常丰富,受到人们的喜爱
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不仅如此,长辈们从小教育我们说,吃核桃补脑,要多吃一点,吃了就能变聪明,考个好大学,
走上人生巅峰!
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吃了这么多年核桃,突然有个疑问,吃核桃真的能补脑吗?事实上人的大脑是非常复杂的
不同年龄段补脑的内涵不同,所以不是一两句话就能说清楚的,今天我们就带大家一起刨根问底
未成年人吃核桃能变聪明吗?
青少年时期,补脑指的是脑细胞的发育。脑细胞的发育是离不开必需脂肪酸的。必需脂肪酸是指人体需要,却不能自身合成,必须从食物中摄取的脂肪酸。
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核桃仁中的营养物质有三分之二为脂肪,其中的亚油酸和α-亚麻酸都是必需脂肪酸。
如果在长身体的年纪缺乏必需脂肪酸会发生什么呢?会导致脑神经系统的“组装”因缺乏原料导致质量下降。吃核桃则可以在一定程度上防止这种事情发生。
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成年人吃核桃也能补脑?
青年时期补脑,主要是补充脑组织的营养。也就是必需脂肪酸的合理供应,有利于脑组织的营养维持。很显然,吃核桃在这时也会有帮助。
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中年时期补脑,主要是防止脑组织衰老。核桃脂肪中不饱和脂肪酸含量可达到90%,这些不饱和脂肪酸具有抗氧化性。有一种说法就是氧化是衰老的机制,而抗氧化有助于抗衰老,包括脑细胞的衰老。
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核桃中的蛋白质含量为18%,其中谷氨酸和精氨酸的含量排在前两位,作用分别是促进脑细胞呼吸和促进血氨代谢,也可以抗氧化。
老年人也要补脑,主要目的是脑部退行性疾病的预防及缓解。其中包括:
抗氧化。核桃脂肪中的不饱和脂肪酸和核桃蛋白中的谷氨酸及精氨酸发挥着抗氧化的作用,可以一定程度上避免脑部退行性疾病的发生。
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有利于预防帕金森病。核桃提取物在帕金森病模型中具有神经保护作用,可能具有预防或治疗帕金森病的潜力。
综上所述,吃核桃虽然对大脑有一定益处,但作用有限,并不是吃了就会让人聪明,不可将其作为变聪明的决定性因素!
更加有效的补脑方法有哪些?
均衡营养。保证必需脂肪酸、必需氨基酸的摄入。适量吃水产品、坚果、新鲜果蔬等,保证脑细胞的生长、发育均有足够的原料供应。
合理的休息。过度的脑力劳动,会让脑细胞能量过度消耗,甚至诱导其凋亡。尽管人脑内有大量的脑细胞储备,但因为脑细胞是不可再生的,所以不要让大脑“过劳”。
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必要的训练。针对不同年龄段,配合必要的智力训练,也就是我们的学习活动,有助于脑细胞的发育和神经细胞间联结的建立。
吃核桃还有哪些好处?
适量吃核桃有助于预防心脑血管疾病。
核桃中含有的亚油酸和亚麻酸,是体内合成前列腺素E(PGE)的必需物质,而PGE可防治血栓、降血压、防止血小板聚集,从而预防心脑血管疾病。
在一项包括7480名40-85岁且具有心血管风险的人群的前瞻性研究的数据显示,亚油酸可降低缺血性脑卒中的风险。
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而α-亚麻酸可以促进血脂转运,降低血脂。
此外,核桃内种皮中的核桃多酚可以抑制低密度脂蛋白的氧化,在抗动脉粥样硬化方面具有潜力。
吃核桃有哪些注意事项?
要食用新鲜的核桃,和储存时间不长、储存条件合理的核桃。霉变的核桃千万不要吃。
核桃营养丰富,容易招惹霉菌,一旦霉变,不仅口感上变得很差,还会产生霉菌毒素,对身体产生危害。
核桃脂肪含量高,能量高,肥胖人群不建议食用。此外脂肪消化需要胆汁乳化,因此肝病患者不宜多吃核桃。胆结石患者不宜食用,以免刺激胆囊剧烈收缩。幼儿也不宜多吃,因为消化系统尚未发育成熟。
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吃了较多核桃后,会引起食欲减退,饱腹感强,因此建议控制每日及单次食用数量,以免影响正餐。
整体上来说
吃核桃确实对大脑有一定益处
对健康有益处
但并不是说能让人变聪明
且作用较为有限
不要把它神化
不可以。因为以形补形是错误的理解,而且核桃只是蛋白质含量较高,所以不可以补脑。
可以,因为核桃还是挺有营养的,但是不能吃多了也不好。
核桃确实可以补脑,但是补脑的效果是比较差的。而且吃多了核桃对人体健康有害的,因为核桃热量太高了,吃多了容易肥胖。
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