"牙醫師警告民眾小心汽水"

氣泡飲料呈酸性，將使牙齒更加脆弱。

牙醫師和健康學者再次警告大眾汽水和果汁的可怕。除了飲料內含的高糖分外，飲料本身也是酸性的，因此可能導致牙齒受侵蝕。一份最新研究指出，經常喝酸性飲料的人牙齒受侵蝕的機率是一般人的6.5倍。

酸會侵蝕覆蓋在牙齒表面的保護層琺瑯質，使牙齒更加敏感。時間一久，這個過程會使牙齒染黃，並導致蛀牙。巴黎狄德羅大學教授柯隆解釋：「牙齒接觸到pH值低於5.5的物質時，便會開始流失礦物質。氣泡飲料、提神飲料、冰茶、果汁、加味水、酒和啤酒的pH值都接近於2.5（等同於檸檬汁）至4.5之間。」

牙醫師說，保護牙齒最好的方法就是喝水。然而，他們也說，氣泡飲料吃飯時喝比較安全，因為咀嚼時會分泌唾液，可幫助中和酸性。他們也建議，喝完酸性飲料後喝水漱口，或是嚼無糖口香糖。

(Health) Dentists Warn against Soda

Fizzy drinks are acidic and leave your teeth much weaker.

Dentists and health researchers are again warning the public about the dangers of soda and fruit juices. In addition to the high levels of sugar these beverages contain, they are also very acidic, which means they can lead to the erosion of teeth. One recent piece of research suggested that those who regularly drink acidic beverages are 6.5 times more likely to suffer dental erosion.

Acid wears down the protective enamel that covers teeth, leaving them more sensitive. Over time, the process can discolor teeth and even result in tooth decay. Paris Diderot Universitys Professor Pierre Colon explained: Teeth begin to lose mineral content when they are exposed to a pH of less than 5.5. Fizzy drinks, energy drinks, iced tea, fruit juice, flavored water, wine and beer all have pH levels of between 2.5 (equal to lemon juice) and 4.5.

Dentists say the best thing you can do for your teeth is to drink water. However, they add that drinking fizzy drinks with a meal is safer since you produce saliva when you chew, and that helps to neutralize the acid. They also advise rinsing your mouth with water or chewing sugar-free gum after having an acidic drink.

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