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Coke and our health composition 450 words
I don't know when it started, and drinking coke became a fashionable thing on campus. Students always like to carry a bottle of coke in their hands when they are free, and take a sip with relish when they are free. I have long heard that coke is harmful to human body. Students who like to drink coke look fat, strong and full of spring, but they are actually very weak.

I really want to tell my classmates: "There are countless dangers of coke, so don't drink coke!" "Coke contains sugar, phosphoric acid, pigments, caffeine, carbon dioxide and other substances. Drinking cola will not only lead to osteoporosis, stimulate gastric juice secretion, gain weight, stimulate myocardial contraction, accelerate heartbeat and breathing, but also corrode teeth, reduce calcium absorption in the body, and affect the normal development of bone growth and height. Someone did an experiment, soaking a nail in coke, and ten days later, the nail gradually dissolved! What a surprise. It is harmful for children to drink coke because it contains caffeine. 1 bottle of 340g cola beverage contains 50 ~ 80mg of caffeine. Someone has done experiments. Adults who take caffeine more than 1 g at a time can cause central nervous system excitement, accelerated breathing, tachycardia, insomnia, dizziness and tinnitus. Even if the dosage of 1 time is less than 1 g, poisoning symptoms such as nausea, vomiting, dizziness, palpitation and precordial pain will occur due to the stimulation of gastric mucosa. A country held a cola drinking competition. A man drank eight bottles of coke and died of excessive carbon dioxide and lack of oxygen. Seeing this, you will all say, "Coke is so harmful! "That's not all! The pigment in cola will cause cancer if it accumulates in the body for a long time. All kinds of carbonated drinks have high sugar content, and long-term drinking can easily lead to obesity. Coke contains caffeine sodium, similar to caffeine, and also contains preservatives. These ingredients are not good for health and have no nutritional value. Drinking these drinks for a long time will definitely cause problems. Coke is like a horrible, roaring demon that sends people to death day and night.

Coke is poisonous, and it's no use drinking too much!

Zheng Zhanrong, Grade 6, Guanghou Central Primary School, sanxiang town