Carbonated drinks contain sugar. A can of 355 c.c. Coke contains about 35 grams of sugar, equivalent to 140 calories, which is equivalent to half a bowl of rice. However, only the calories are the same, but the nutrients are very different. Because sugar only contains calories and no other nutrients at all, it is an empty calorie food or junk food with empty calories. If you drink it regularly, it will add up to weight gain, and at the same time, it will also cause weight gain. It is easy to develop bad eating habits of craving for sweetness, and only like to drink sweet water instead of plain water. In addition, sugar also has a negative impact on dental health. The biggest side effect is the loss of calcium. 1. Coke contains caffeine, which makes it addictive if you drink it for a long time. 2. Coke contains carbonic acid, drinking too much is bad for your health. Because the human body is in the best condition when it is weakly alkaline. 3. There is no protein, etc. and lack of nutrients. 4. Drinking it for a long time will make you fat because it contains sugar. 5. In addition, when carbonated drinks represented by Coca-Cola first came out, because of their good taste, the gas they produced could bring out the heat in the stomach, giving people a feeling of comfort and excitement. After getting used to drinking, people will develop a certain dependence on carbonated drinks. In fact, carbonated drinks have no nutritional value. According to reports, various types of carbonated drinks contain high sugar content, and drinking them for a long time can easily lead to obesity. Coke contains sodium chloride, which is similar to caffeine and also contains preservatives. These ingredients are not good for the body and have no nutritional value. Drinking these drinks for a long time will definitely cause problems. Experts recommend drinking as little carbonated drinks as possible, especially for children, women and the elderly. "In fact, the best drink in China is our national drink - tea, especially green tea. Even if you drink boiled water, it is better than drinking carbonated drinks." Drinking cola is harmful to children. Coke contains caffeine, and a 340-gram bottle of cola-type drink contains 50 to 80 mg of caffeine. Some people have done experiments and found that adults taking more than 1 gram of caffeine at a time can cause excitement in the central nervous system, accelerated breathing, tachycardia, insomnia, vertigo, and tinnitus. Even if less than 1 gram is taken at a time, poisoning symptoms such as nausea, vomiting, dizziness, palpitations, and precordial pain may occur due to stimulation of the gastric mucosa. Children are more sensitive to caffeine than adults, so do not give them cola-type drinks. Girls should drink Coke to prevent osteoporosis. Studies have shown that soda will accelerate bone loss, especially girls who like to drink cola. The chance of fracture is five times higher than that of those who do not drink soda! Experts pointed out that the phosphoric acid in cola may be the cause of easy fractures. Phosphoric acid is harmful to bone quality because phosphoric acid has an adverse effect on calcium metabolism and bone quality. On the other hand, young girls who drink cola may have insufficient milk intake, which makes their bodies lack calcium and are prone to fractures. Newlyweds should also be careful about drinking cola. Because most cola-type drinks contain a high content of caffeine, caffeine can easily enter the fetus through the absorption of the placenta, which can endanger the fetus's brain, heart and other organs. It can also cause malformations or congenital diseases in the fetus. Therefore, experts suggest that in addition to abstaining from smoking and alcohol, newlyweds and couples who want to have children should not drink cola-type drinks. Even after the baby is born, nursing mothers should not drink cola-type drinks. Because caffeine can also enter the baby's body indirectly with milk and harm the baby's health. The elderly should not drink cola. Coke has a diuretic effect and can reduce calcium absorption by half. Frequent consumption of caffeinated beverages by the elderly can aggravate the lack of calcium in the body, cause osteoporosis, and easily lead to fractures.