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Ask for an English paper about caffeine of about 1000 words.
Caffeine (from caffeine) is an alkaloid extracted from the fruits of tea and coffee. When used properly, it can relieve fatigue and excite nerves, and is used to treat neurasthenia and coma recovery. However, large doses or long-term use will also be harmful to the human body, especially it is addictive. Once mental fatigue occurs, it will have various withdrawal symptoms. Although its addiction is weak, the withdrawal symptoms will not be very serious. However, due to the improved tolerance, caffeine will not affect the cerebral cortex and medulla oblongata, but also directly cause excitement and paroxysmal convulsions of important organs such as bones, liver, stomach and kidney, induce airway inflammation, female breast tumors, and even cause diseases such as intelligence and physical deformity of the next generation of smokers. Therefore, it is also included in the psychotropic drugs under state supervision.

Caffeine also has two forms: smoking abuse and injection abuse, and its excitement and adverse reactions, symptoms and drug dependence are similar to those of amphetamine.

There are many "Golden Triangle" areas in China where crimes collude with caffeine smuggling by other drug dealers. At present, caffeine exceeds the legal requirements and is an illegal channel for the production of legal persons. Too much caffeine can lead to caffeine poisoning. Its symptoms are irritability, nervousness, insomnia, blushing, urination and digestive system discomfort. Some people will have these symptoms when they use less than 250 mg daily. More than 65438 0 grams per day can cause sudden spasms, thinking and language conversion, heartbeat and tachycardia, and psychomotor-induced vitality. Caffeine poisoning symptoms are similar to panic and comprehensive anxiety. 192 mg/ kg body weight [common source of request] or adults may cause 72 coffees to die.

Caffeine is safe, but caffeine and other similar substances such as theophylline and caffeine are toxic to other animals such as dogs and horses because their livers are related to metabolism. Now doctors say that caffeine and bone loss and osteoporosis are advised to eat enough food, coffee, tea and so on. Long-term excessive intake of caffeine can cause a series of mental disorders. Two tests by the American Psychiatric Association are caffeine anxiety and caffeine sleep disorder.

Caffeine sleep disorder refers to a person's sleep disorder caused by frequent intake of high doses of coffee, which can be found in clinical diagnosis.

For some individuals, the anxiety caused by large doses of coffee drinks is enough for clinical diagnosis. Caffeine is used in different forms of anxiety, general anxiety, panic attack, obsessive-compulsive disorder and even phobia. Because these symptoms are easily confused with basic neurological disorders, such as panic disorder, anxiety disorder, anxiety disorder and even schizophrenia, some medical workers think that part of caffeine intake has been misdiagnosed and treated unnecessarily, and they think that caffeine-induced mental illness can be easily controlled by cutting off the source of caffeine. A British Journal of Addiction: An addiction survey shows that although it is rarely diagnosed as chronic poisoning, at least one tenth of the population suffers from caffeine.