Recent studies have found that eating apples damages teeth far more than drinking carbonated drinks. The former can damage up to 4 times as much as the latter.

Liquor and beer also increase the risk of tooth damage. Onions and grapefruit do not, but we don't normally eat much of the two. “The problem is not what we eat but how we eat,” said David Butler, deputy dentist of the Dentistry Institute at the King’s College School of Medicine at the University of London, UK. Doctors like to say that eating apples is good, but if you eat very well, Slowly, those high acids can damage your teeth, and the so-called 'corrosion' beverages that we often drink, especially Coke, do not show the increased risk of damage to the teeth."

The researchers emphasized that when doctors give advice to people, they should focus on paying attention to strong acids, rather than general requirements for drinking less soft drinks that we usually drink.

In this new study, the researchers analyzed the connection between dental wear and beverages in several parts of the oral cavity. A total of more than 1,000 teeth of men and women aged between 18 and 30 years old were investigated. The teeth were 2 mm thick enamel and dentin, and then compared with their drink habits. People who eat apples are 3.7 times more likely to be damaged than those who drink carbonated drinks.

Juices have a four-fold increase in the likelihood of damage to the tooth top enamel and an acidic beer three times more likely to damage the tooth. Some types of apples contain up to 4 teaspoons of sugar, which leads to increased levels of acid in the mouth. However, Dr. Glass-Jones, nutritionist at the British Medical Research Council Human Nutrition Research Department, said: "Fruit may be acidic and obviously contain sugar, but I do not recommend anyone to refuse to eat fruit and juice."

One of the researchers’ suggestions is to drink milk or eat a slice of cheese while eating apples. Because milk and cheese contain calcium, calcium can neutralize acids. Drinking water immediately after eating an apple is also a good choice. Jones said: "It's helpful to brush your teeth before eating acidic foods because it can build a barrier between food and teeth."

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