People who drink two or more sweetened soft drinks a week have a much higher risk of pancreatic cancer, an unusual but deadly cancer, researchers reported on Monday.

    People who drank mostly fruit juice instead of sodas did not have the same risk, the study of 60,000 people in Singapore found.

    Sugar may be to blame but people who drink sweetened sodas regularly often have other poor health habits, says Mark Pereira of the University of Minnesota, who led the study.

    "The high levels of sugar in soft drinks may be increasing the level of insulin in the body, which we think contributes to pancreatic cancer cell growth," Pereira says.

    Insulin, which helps the body metabolize sugar, is made in the pancreas.

    Writing in the journal Cancer Epidemiology, Biomarkers & Prevention, Pereira and colleagues say they followed 60,524 men and women in the Singapore Chinese Health Study for 14 years.

    Over that time, 140 of the volunteers developed pancreatic cancer. Those who drank two or more soft drinks a week had an 87 percent higher risk of being among those who got pancreatic cancer.

    Pereira says he believed the findings would apply elsewhere.

    "Singapore is a wealthy country with excellent healthcare. Favorite pastimes are eating and shopping, so the findings should apply to other Western countries," he says.

    But Susan Mayne of the Yale Cancer Center at Yale University in Connecticut was cautious.

    研究者于本周一宣布：每周飲用至少兩次甜味軟飲料的人患胰腺癌的幾率較高，這種癌癥雖不常見(jiàn)但有致命危險(xiǎn)。

    專家在新加坡對(duì)60000人進(jìn)行研究發(fā)現(xiàn)，只喝果汁而很少喝碳酸飲料的人患胰腺癌的幾率不高。

    此項(xiàng)研究負(fù)責(zé)人、明尼蘇達(dá)大學(xué)的馬克派瑞拉表示：糖分含量高可能是主要原因，但不排除喝甜味碳酸飲料的人有其他不良習(xí)慣。

    派瑞拉說(shuō)："軟飲料中含糖量較高有可能導(dǎo)致胰島素分泌量增加，胰島素增多會(huì)促進(jìn)胰腺癌癌細(xì)胞的生長(zhǎng)和擴(kuò)散。"

    促進(jìn)體內(nèi)糖分代謝的胰島素是由胰腺分泌的。

    派瑞拉及其同事在期刊《Cancer Epidemiology, Biomarkers & Prevention》發(fā)表文章稱：他們?cè)谛录悠氯A人健康研究中心對(duì)60524名測(cè)試志愿者進(jìn)行了14年的跟蹤研究。

    14年中，有140名志愿者患上了胰腺癌。這些人中，每周至少喝兩次軟飲料的志愿者患胰腺癌的幾率高出87%.

    派瑞拉相信這些研究數(shù)據(jù)適用于別的國(guó)家和地區(qū)。

    他說(shuō)："新加坡非常富有，醫(yī)療衛(wèi)生條件先進(jìn)。最主要的消遣方式就是飲食和購(gòu)物。所以這些數(shù)據(jù)應(yīng)該適用于其他西方國(guó)家。"

    但是美國(guó)康涅狄格州耶魯大學(xué)耶魯癌癥研究中心的蘇珊梅恩對(duì)此研究結(jié)果較為謹(jǐn)慎。