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首页 >> 咖啡專欄 >>咖啡文化 >> 咖啡因的安全攝取量

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咖啡因的安全攝取量

咖啡對西方人而言是生活中不可或缺的飲料，不管是晨起喚醒沈睡中的靈魂、工作中的提神或是午茶的優閑，都離不開咖啡。

“咖啡因”爲存在于60種以上植物葉子、種子或果肉中的天然成份，例如：咖啡豆、可可豆、可樂豆和茶葉等，而最通常之食物來源爲咖啡、茶、巧克力和清涼飲料(如：可樂、含茶飲料)，咖啡因具輕度的中樞神經刺激作用，可減輕疲勞感、增強記性、推理能力和智力的靈活度，只要少少的32毫克(約1杯可樂的含量)，就可以增進聽覺和視覺的反應時間，但每個人對咖啡因的敏感性有很大的不同，有些人覺得增加靈活度的咖啡因量，可能某些人就會覺得不舒服，老年人可能對咖啡因的效用更敏感。

成年人每天咖啡因的安全攝取量，专家们建议约300毫克/天是适量的，相当于约3杯咖啡的含量，且每次的频率间隔应大于3~4小时。

然而每個人對咖啡因之感受性皆不相同，其影響因素包括喝的量、頻率、個人代謝率、體重和生理狀況等，所以，所謂的適量應依個人對咖啡因的反應而定。

適量的飲用咖啡是安全的，但應注意攝取足量的鈣質及均衡的營養，避免攝取過多含糖之空熱量食品，才是保健之道。

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"We walked by the side of our teams or behind the wagons, we slept on the ground at night, we did our own cooking, we washed our knives by sticking them into the ground rapidly a few times, and we washed our plates with sand and wisps of grass. When we stopped, we arranged our wagons in a circle, and thus formed a 'corral,' or yard, where we drove our oxen to yoke them up. And the corral was often very useful as a fort, or camp, for defending ourselves against the Indians. Do you see that little hollow down there?" he asked, pointing to a depression in the ground a short distance to the right of the train. "Well, in that hollow our wagon-train was kept three days and nights by the Indians. Three days and nights they stayed around, and made several attacks. Two of our men were killed and three were wounded by their arrows, and others had narrow escapes. One arrow hit me on the throat, but I was saved by the knot of my neckerchief, and the point only tore the skin a little. 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