近日，微博上盛传“吃西红柿炖螃蟹等于吃砒霜”，理由是螃蟹是甲壳类的生物含有五价的砷，在维生素C的作用下，它会变成三价的砷化物，即老百姓所说的砒霜。这种说法有无科学性？昨日，记者就此采访了广州相关营养专家。

recently,Micro blog is widely"Eat tomato stew crab is equal to eat white arsenic",Reason is crab is crustaceans biological containing pentavalent arsenic,In under the action of vitamin C,It will become trivalent arsenic,That is spoken by arsenic trioxide.This statement is scientific?yesterday,The reporter interviews guangzhou related nutrition experts.

　　“这种说法太夸张。”武警广东总队医院营养科副主任曾晶告诉记者，螃蟹是甲壳类生物，可能受到砷、汞等重金属污染。西红柿中所含有的维生素C具有还原性。从理论上来讲，在一定条件下实验室的试管内的确能发生将五价砷还原成三价砷这样的化学反应。可是，通过进食，螃蟹和西红柿在人体，受其所含物质的浓度、体内温度、胃酸以及其他食物组分的影响和干扰，理论上成立的这种“砷转化”在实际中很难发生。

"This statement too exaggeration."Armed police corps guangdong hospital nutrition vice director of division of CengJing told reporters,Crab is crustaceans,May be arsenic/Mercury and other heavy metal pollution.Tomatoes contain vitamin C is reducing.theoretically,Under certain conditions of the laboratory in vitro can really happen will quinquevalence arsenic reduction into trivalent arsenic such chemical reaction.but,Through the consumption,Crabs and tomatoes in the human body,Affected by the concentration of containing substances/Body temperature/Hydrochloric acid in gastric juice and other food components and the influence of interference,Established in this"Arsenic transformation"In practice, it is difficult to occur.

　　吃螃蟹是否需要禁食含维生素C的食物？“不需要。”曾晶表示，在不过量的情况下，螃蟹和含有维生素C的食物可以同食。对于正常人群来说，营养学上并不主张长期额外补充维生素C片。若一定要服用，建议在吃螃蟹前2小时或餐后4小时服用，这样安全度会更高。

If you need to eat crab fast contain vitamin C food?"Don't need."CengJing said,In the not too much cases,Crabs and contain vitamin C food can with food.For normal crowd,Nutrition is not advocated long-term extra itamin C tablet.If you have to take,Suggestions in eat crab 2 hours before or after dinner took four hours,Such safety will be higher.

　　专家提醒 The expert reminds

　　不主张吃蟹时喝啤酒 Don't claim to eat crab to drink beer

　　曾晶说，螃蟹性咸寒，富含高蛋白，容易引起过敏和消化道不良反应。老人、小孩、胃溃疡及十二指肠溃疡这类脾胃虚弱的人群，要注意吃蟹不要过量。“我们还不主张吃蟹时饮酒，尤其是啤酒。”曾晶解释说，这是因为膳食中嘌呤类物质含量较高，可能导致血尿酸升高，诱发痛风。如果无法避免吃蟹时饮酒，可饮少量红酒。(记者张丹羊、徐一斐)

CengJing said,Crab sex salted cold,High in protein,Easy to cause allergic and gastrointestinal adverse reaction.The old man/The child/Gastric and duodenal ulcer this kind of spleen and stomach weak crowd,Attention should be paid to eat crab don't overdo."We do not claim to eat crab when drinking,Especially beer."CengJing explained,This is because the dietary purine compounds in content is higher,May lead to increased blood uric acid,Induced gout.If cannot avoid eating crab when drinking,Can drink a small amount of red wine.(Reporter zhang sheep/Xu ophir a)