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给大家科普一下美国肉类抗生素和激素的问题

http://gengwg.blogspot.com/信人: firebat (给我一掌海棠红), 信区: Military
标  题: 给大家科普一下美国肉类抗生素和激素的问题
发信站: BBS 未名空间站 (Sat Dec 29 01:58:52 2012, 美东)

国人其实在这个事情上有相当的误解.
正好我是做相关方向的,给大家说一下.

首先, 激素使用.
美国政府不允许在家禽和猪饲养中用激素. 牛肉会用.
随便找的科普:
http://www.drweil.com/drw/u/id/QAA400066
但是即使是牛肉,出栏前几个星期不许再喂.激素半衰期只有几个小时(<10h br=""> 时期>99.99%人工激素都被动物消除.最后合成激素即使用最灵敏的LC/MS/MS也不许检出
(0.1ng/mL以下的检测线),否则罚款是巨大的.当然动物自己也产生激素,水平在2-50ng/
mL血浆浓度.因此合成激素或者人工添加激素的影响忽略不计.

第二,抗生素.
抗生素的使用范围没有限制,但是用量有严格限制.另外,出栏前1个星期不
能再使用,保证完全消除.所以肉里的抗生素对人没有影响,因为量基本上要到ppb以下.
但是,有些人的concern是这样是否产生耐药菌,这些耐药菌是不是有可能传到人(虽然可能
性很小).这个问题至今没有结论.但是可能不是大部分人的concern.

参加这个Montana大学的科普文献:
http://animalrangeextension.montana.edu/Articles/Beef/Wklynwslt

第三,有机食品.我们家也吃有机食品,但是不是因为它们更安全,因为我们觉得环保和感
觉好,仅此.这是一种选择而已.请google一下是否有机食品更安全(找那种学术一点的,
而不是有机食品公司的托或者大妈论坛那种).如果你仔细读有机食品标签和说明,就会
发现这些公司从来不说有机食品本身含有更少的激素,抗生素之类,而是说在生产过程中
没有使用. 但是这些小心的措辞可能起到误导效果:你会觉得它更健康
随便几个个链接:
http://www.reuters.com/article/2012/09/03/us-organic-food-idUSB

http://www.npr.org/blogs/thesalt/2012/09/04/160395259/why-organ
目前没有证据证明有机食品比普通食品更加健康和安全.但是,有机食品在生产时对环境
更加友好(例如不产生有抗生素的粪便,等等),而且对色素和防腐剂一般要求更严格,这
是它们的优点.但是买有机食品为了避免抗生素和激素,是种误解.
但是,我还是提议大家吃有机食品,环保很重要.

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