抗生素可以讓你發胖?Can Antibiotics Make You Fat?

工廠式飼養動物被餵以抗生素,以使他們發胖。對我們的腰圍有影響嗎? - 早在20世紀40年代,科學家們發現,經常低劑量的抗生素增加了“飼料效率”, 每磅飼料可造成更重的動物。沒有人知道為什麼會這樣,但農民就抓住這個意想不到的好處。到了20世紀80年代,美國肉類生產越來越多地轉移到工廠化養殖場,飼料裡摻少量的藥物成為平常的做法。在2009年,在美國銷售的抗生素估計有80%的去餵給牲畜。今年,科學家可能終於想通了為什麼小劑量的抗生素會“促進增長”, 正如業界的說法:“腸道微生物微妙的變化”紐約大學的研究人員在8月的“ 自然“科學雜誌發表一份報告,正如在工廠式飼養農場裏的牛,豬,雞一樣,一組老鼠被經常地餵以低劑量的抗生素。其結果是:經過七週餵藥的小鼠的腸菌群成分不同;此外,他們增加了10%到15%的脂肪量。 - 他們從英國90年代初的研究數據進行分析,看是否能找到孩子們食用抗生素和體重之間的相關性。這項研究涉及11000多名孩子,大約有三分之一在六個月大之前已因為治療感染而被處方抗生素。其結果是:曾接觸到抗生素的嬰兒有22%的機會在三歲時超重(雖然影響在七歲時已經消退)。   -最近的一個歐洲研究顯示:在工廠式飼養的農場裏出現耐藥性細菌,是越來越普遍... 原文(英文)在此 fat_425x320 - Back in the 1940s, scientists discovered that regular low doses of antibiotics increased "feed efficiency"—that is, they caused animals to put on more weight per pound of feed. No one understood why, but farmers seized on this unexpected benefit. By the 1980s, feed laced with small amounts of the drugs became de rigueur as US meat production shifted increasingly to factory farms. In 2009, an estimated 80 percent of the antibiotics sold in the United States went to livestock. - This year, scientists may have finally figured out why small doses of antibiotics "promote growth," as the industry puts it: They make subtle changes to what's known as the "gut microbiome," - In an August study published in Nature, a team of New York University researchers subjected mice to regular low doses of antibiotics—just like cows, pigs, and chickens get on factory farms. The result: After seven weeks, the drugged mice had a different composition of microbiota in their guts than the control group—and they had gained 10 to 15 percent more fat mass. - They analyzed data from a UK study in the early '90s to see if they could find a correlation between antibiotic exposure and kids' weight. The study involved more than 11,000 kids, about a third of whom had been prescribed antibiotics to treat an infection before the age of six months. The results: The babies who had been exposed to antibiotics had a 22 percent higher chance of being overweight at age three than those who hadn't (though by age seven the effect had worn off). - a recent European study showed that, even at very low levels, antibiotics can blast "good" bacteria—and promote deadly germs. - drug-resistant bugs—which often emerge in antibiotic-dosed livestock on factory farms—are increasingly common original article here