Eating sweet foods produces acid in the mouth, which can cause tooth decay. (High acid levels are measured by low pH values)
Describe the information below and discuss the implications for dental health.
You should write at least 150 words.
Allow yourself 20 minutes for this task.
【首段】总述过多的糖会伤害牙齿，因为糖会使得pH值下降 【二段】甜食让pH值下降到5.5以下，时间越长越容易蛀牙 【三段】分述蔗糖最易引起蛀牙 【四段】分述果糖和蜂蜜对pH值的影响 【尾段】总述果糖和蜂蜜要比蔗糖好
Anyone who has visited a dentist has been told that eating excessive amounts of sweets risks harming the teeth. This is because sweets lower pH levels in the mouth to dangerous levels.
When the pH level in the mouth is kept above 5.5, acidity is such that teeth are unlikely to be in danger of decay. Sweet foods, however, cause pH in the mouth to drop for a time, and the longer pH levels remain below 5.5, the greater the opportunity for decay to occur.