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What about chewing gum?
The harm of chewing gum is not great. Its ingredients are edible, just like QQ candy.

For the time being, besides sugar-free and xylitol chewing gum, there are also sugar, spices and sweeteners. Among them, the sweetener refers to aspartame, which is approved for use in food in China. It is usually used in dairy products, sweets, chocolates, chewing gum, table sweeteners, health foods, pickles and cold drinks. This usage is legal and will be indicated on the food.

Extended data:

Advantages of chewing gum:

1, bringing fresh breath and covering up bad breath in a short time.

2, through the friction between the teeth, indirectly clean the soft dirt on the teeth, which has an auxiliary cleaning effect. It is recommended to choose sugar-free and xylitol chewing gum.

3, used to kill boring time.

Although chewing gum will not cause direct harm to human body, we still need to pay attention to:

1, chewing for a long time will make the masseter muscle hypertrophy. Girls who love beauty will get bigger if they chew gum for a long time.

2. For patients with stomach diseases, continuous chewing in the mouth will stimulate the secretion of digestive enzymes, especially in the case of fasting, there will be symptoms such as nausea, loss of appetite and pantothenic acid water, which will aggravate stomach diseases for a long time.

3, for children, it is swallowing the trachea by mistake, which is easy to cause suffocation.

4. It's best not to chew gum for those who have filled their teeth, and it's best not to chew gum for those who have filled their teeth with mercury-containing materials. Swiss scientists have found that chewing gum often destroys the substances used to fill teeth in the mouth and releases amalgam, which leads to excessive mercury content in blood and urine, thus causing damage to the brain, central nervous system and kidneys.

5. Try to choose sugar-free or xylitol chewing gum. Cariogenic bacteria in the oral cavity can use sucrose to produce acidic substances, which in turn corrode teeth. Xylitol can't be used by cariogenic bacteria and can't provide nutrition for bacteria. At the same time, xylitol is helpful to early dental caries and can play a role in natural restoration, so it can prevent dental caries.

References:

People's Network-Does chewing gum really cause cancer? Will chewing gum stick to the intestines?

People's Network-Five Things to Pay Attention to when Chewing Gum