吃西瓜不可不知的8大禁忌

西瓜營養豐富，可以解暑、除煩止渴等功效，因此是夏季的最佳水果。西瓜是人們在盛夏每天必吃的水果。然而吃西瓜也有禁忌。
　　
一、糖尿病人
　　
西瓜約含糖類5%，且主要是葡萄糖、蔗糖和部分果糖，也就是説吃西瓜後會致血糖增高。正常人由於會及時分泌胰島素，可使血糖、尿糖維持在正常水平。而糖尿病人則不同在短

時間內吃太多西瓜，不但血糖會升高，病情較重的還可能因出現代謝紊亂而致酸中毒，甚至危及生命。糖尿病人每天吃的碳水化合物(糖類)的量是需要嚴格控制的，因此如果一天中多次

吃了西瓜，那麼應相應地減少吃飯和面製品(碳水化合物)的數量，以免加重病情。
　　
二、腎功能不全者
　　
腎功能不全患者，對排出體內水分的功能大大降低，所以常會出現下肢或全身水腫。這類病人若吃太多西瓜，會因攝入過多的水，又不能及時將多餘的水排出，致使水分在體內超量儲

存，血容量增多，因此不但使水腫加重，且容易誘發急性心力衰竭。故而腎功能不全患者以少吃或不吃西瓜為好。
　　
三、感冒初期
　　
醫學認為，不論是風寒感冒還是風熱感冒，其初期均屬於表證，應採用讓病邪從表而解的發散治療方法。並認為在表未解之前若攻之會加重病情。而西瓜有清裏熱的作用，所以這個時候

吃西瓜會使感冒病情加重或病程延長。
　　
四、口腔潰瘍病人
　　
口腔潰瘍在中醫中被認為是陰虛內熱、虛火上擾所致。由於西瓜有利尿作用。若口腔潰瘍者多吃西瓜，會使口腔潰瘍復原所需要的水分被過多排出，從而加重陰虛和內熱，使病程綿延，

不易癒合。
　　
五、産婦
　　
産婦的體質比較虛弱，中醫認為多吃西瓜會過寒而損脾胃。
　　
六、不宜在飯前及飯後吃
　　
因為西瓜中大量的水分會沖淡胃中的消化液，在飯前及飯後吃都會影響食物的消化吸收，而且飯前吃大量西瓜又會佔據胃的容積，使就餐中攝入的多種營養素大打折扣，特別是對孩子、

孕婦和乳母的健康影響更大。而對於想通過節食減肥的人則在飯前吃點西瓜不失是一種減少食物攝入的好方法。
　　
七、西瓜不宜吃得太多
　　
因為西瓜屬於「生冷食品」，任何人吃多了都會傷脾胃，導致食欲不佳、消化不良及胃腸抵抗力下降，引起腹脹、腹瀉。
　　
八、少吃冰西瓜
　　
雖然大熱天吃冰西瓜的解暑效果很好，但對胃的刺激很大，容易引起脾胃損傷，所以應注意把握好吃的溫度和數量。最好把西瓜放在冰箱冷藏室的最下層，這裡的溫度大約是8-10℃，這個溫度口味也最好，每次吃的量不要超過500克，且要慢慢地吃。對於有齲齒(蛀牙)和遇冷後即會感到酸、痛的牙過敏者，以及胃腸功能不佳者就不宜吃冰西瓜。

不宜在飯前及飯後吃<<咁要係幾時食??

我經常飯後吃，多數係成晚去小便，有時甚至要去拉大便。
吃的原因，主要是口腔長痱滋，所以就食西瓜了。

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