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2两螃蟹胆固醇等同5两肥肉?健康吃蟹听医生怎么说

2017-09-28 16:02:52   

浙江在线-健康网9月28日讯(记者 柴燕宏 通讯员 沈笑驰)秋风起,螃蟹肥,又到一年吃蟹时。俗话有“西风响蟹脚痒”,说的就是每年金秋之时,螃蟹黄满膏肥,是最佳的品尝时机。

国庆假期将要来临,除了出行旅游,品尝美食也是“顶天”的大事。不管是在异地观赏美景,或是在家中与亲人团圆,满足地吃上一只肥美的螃蟹,都是假期里最惬意的享受。  

虽然螃蟹味美且营养丰富,但“高胆固醇”的称号一直让人们在吃时心存顾虑。网上就流传一种说法,吃2两螃蟹摄入的胆固醇等同于5两肥肉。

真是这样吗?

让我们就吃蟹的几个坊间传言,来听听专家们怎么说:

传言一:吃2两螃蟹等于5两肥肉

坊间说,吃2两河蟹的胆固醇和5两肥肉的胆固醇是一样的。

专家解读:中国营养学会建议,普通成年人每天摄入的胆固醇不要超过300毫克,高血脂者应控制在200毫克以下。然而,按照我国的食物成分表,每100克河蟹中,胆固醇的平均含量为267毫克,的确相当于5两肥肉中胆固醇的量。不过其实这样测算并不准确。因为每天食用的其他食物中也含有一定量的胆固醇,所以吃螃蟹还是最好控制住量。建议每次最多吃一到两只,一周最多吃三次。在吃蟹的同时要少吃肉类、内脏和蛋类,多吃豆制品、蔬菜和水果,以促进胆固醇的代谢。

传言二:螃蟹和维C一起吃会中毒

坊间传言,西红柿和螃蟹一同食用会产生剧毒。因为螃蟹是甲壳类生物,它所含的物质,在维生素C的作用下,会变成老百姓所说的砒霜,吃后会中毒。

专家解读:这种说法很夸张。像虾类和蟹类自身含有一定量的砷化物,在维生素C的作用下,会转化为三氧化二砷,的确是老百姓所说的砒霜。不过要想转变为砒霜,必须是两者一起大量的服用。曾有营养专家做过类似的实验。晚餐吃一只大螃蟹后服用300毫克维生素C,连吃三天也没有出现任何问题。而且,在药学方面,少量的砷化物对人体还有生血的益处,临床上也会用少量砷化物用于白血病的治疗。但是吃蟹时最好避开茶水和黄柿子,因为这两者含有鞣质,易与蟹中蛋白质结合凝固形成结石。同时,寒凉的瓜果比如香瓜、西瓜、梨也是禁忌,因为螃蟹本身属凉性,同吃易出现肠胃不适等情况。 

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