Coke belongs to a carbonated beverage, which contains a large amount of sugar, and often drinking Coke will cause a person's blood sugar to rise, and in serious cases, it will even cause abnormal sugar metabolism. If a patient with diabetes drinks cola, his blood sugar will rise significantly. In addition, after drinking carbonated beverages into the stomach, it will play a neutralizing role in the gastric acid of the gastric mucosa, affecting the digestive function, and the long-term drinking of the mucosa has a stimulating effect, and may even lead to gastritis and gastric ulcers. And cola carbonated drinks sugar and carbonated substances, for the teeth is also harmful, will damage the tooth surface of the enamel, often drink and even lead to dental caries, so cola carbonated drinks is best to drink as little as possible.