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【牛奶雖好可別貪杯】研究稱一天3杯奶死的快

 蘇醒的貝殼 2014-11-04

【英大導(dǎo)讀】牛奶一直被認(rèn)為成健康飲品,有利于補(bǔ)充鈣質(zhì)、降低骨折風(fēng)險(xiǎn)。然而,最新調(diào)查稱攝入過(guò)多牛奶非但不會(huì)降低骨折風(fēng)險(xiǎn),還會(huì)提高致死率?這是真的嗎?快隨英大來(lái)一探究竟吧!


Drinking more than three glasses of milk a day may not protect bones against breaking - and may even lead to higher rates of death, say researchers. A new study suggests certain types of sugars found in milk may increase inflammation and oxidative stress, which can damage body cells.

調(diào)研者稱,每天喝三杯以上牛奶非但不會(huì)幫你預(yù)防骨折,還可能導(dǎo)致更高的致死率。一項(xiàng)最新的研究表明,牛奶中包含的特定糖類會(huì)增加炎癥和氧化壓力,損壞身體細(xì)胞組織。


But Swedish researchers said their study could not prove ‘cause and effect’ and much more research was needed before anyone would be advised to limit their milk consumption.

然而在確定這一調(diào)查結(jié)果之前,瑞典調(diào)查者認(rèn)為還需要進(jìn)行更多的調(diào)查。


Milk is recommended for cutting the risk of fractures because it contains calcium and vitamin D, which are vital for bone strength. However, there have been conflicting results from studies into the health benefits of milk in recent decades, with some showing it prevents heart attacks and strokes and others the opposite.

牛奶因其還有鈣質(zhì)和維生素D、可以預(yù)防骨折而被推薦飲用。然而近年來(lái),牛奶的功效一直備受爭(zhēng)議。有人認(rèn)為牛奶可以預(yù)防心臟病和中風(fēng),而又有人對(duì)此持反對(duì)意見。


Professor Karl Micha?lsson, Sweden, led a team to investigate whether the mechanism for potential harm was consumption of the sugars lactose and galactose found in high levels in milk, compared with much lower levels in other dairy products.

瑞典烏普薩拉大學(xué)卡爾教授帶領(lǐng)一個(gè)小組調(diào)查的內(nèi)容就是:和其他乳制品相比,牛奶中乳糖和半乳糖含量較高,而這是否會(huì)對(duì)人體造成潛在危害。


Two large groups of 61,433 women and 45,339 men in Sweden completed food frequency questionnaires for 96 common foods including milk, yoghurt and cheese. Women were tracked for an average of 20 years, during which time 15,541 died and 17,252 had a fracture, of whom 4,259 had a hip fracture. In women, drinking more milk did not cut the risk of broken bones, says the study published in The BMJ.

瑞典,共有61433名女性和45339名男性接受了關(guān)于攝入牛奶、優(yōu)格和乳酪頻率的問(wèn)卷調(diào)查。關(guān)于女性的追蹤調(diào)查歷時(shí)20年,期間15541名女性過(guò)世,17252名女性曾骨折,其中4259名女性髖骨骨折。飲用牛奶并沒有降低女性骨折的風(fēng)險(xiǎn)。


Men were tracked for an average of 11 years, during which time 10,112 died and 5,066 had a fracture, with 1,166 hip fracture cases. Men who drank more milk also had a higher risk of death, although much lower than in women.In contrast, eating more dairy products such as yoghurt and cheese - with a low lactose content – led to lower death rates and fewer fractures, particularly in women.

而男性的調(diào)查則持續(xù)了11年,期間10112名男性過(guò)世,5066名男性骨折,其中1166名髖骨骨折。飲用更多牛奶的男性死亡率雖與女性相比較低,但仍舊高于牛奶攝入少的人群。相反,攝入乳糖含量較低的優(yōu)格或乳酪之類的乳制品死亡率更低,而且骨折風(fēng)險(xiǎn)更小。


Prof Sue, Head of the Department of Nutritional Sciences, University of Surrey, said the study had limitations, such as weak methods to assess lifestyle habits including bodyweight. She said: ‘Also key is that all milk in Sweden is fortified with vitamin A. This may well be an important confounding factor.

薩里大學(xué)營(yíng)養(yǎng)科學(xué)系主任蘇教授認(rèn)為這些調(diào)研都有其局限性,并不能準(zhǔn)確地評(píng)估包括體重等生活習(xí)慣。她說(shuō),“瑞典的牛奶中有加強(qiáng)補(bǔ)充維生素A,這可能也是關(guān)鍵因素之一。


Milk and dairy products in the UK provide 50-60 percent of the calcium in our diet. We know that low calcium intakes is a risk factor for osteoporosis.’

英國(guó)的牛奶和乳制品提供了日常營(yíng)養(yǎng)攝入中50%~60%的鈣質(zhì)。而我們知道,低鈣攝入會(huì)導(dǎo)致骨質(zhì)疏松?!?/span>


Prof Brian Ratcliffe, Professor of Nutrition, Robert Gordon University, Aberdeen, said the possible role of alcohol intake was understated given that most of the extra deaths in milk drinkers were from heart disease. Lowest milk consumption was associated with the highest consumption of alcohol, and ‘there is considerable evidence for a cardio-protective effect of alcohol at modest intakes’ he said.

羅伯特戈登大學(xué)營(yíng)養(yǎng)學(xué)布萊恩·雷德克里夫教授認(rèn)為,酒精攝入也應(yīng)劃入考慮范圍內(nèi),因?yàn)檠芯恐泻芏嗯D田嬘谜咚烙谛呐K疾病。低牛奶攝入和高酒精攝入是分不開的,而且“有可觀的證據(jù)表明,適量飲酒會(huì)保護(hù)心臟”。

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