1、茶成分里面可以起到一个提神的作用，可以提高人们的工作效率。
茶是一种真正的刺激物，因为茶含有咖啡因成分。咖啡因可以刺激人的神经中枢，促进血液的循环。它还可以帮助肌肉的松驰和影响人体细胞的新陈代谢。多喝茶还可以防止高血压和心脏血管病等疾病。茶经常用于治疗咽喉肿痛和心肌梗塞。临床证明：多喝茶可以治疗伤风感冒和头痛，因为咖啡因里面含有阿斯匹林成分，起到解热镇痛的作用，并没有副作用。
　　 2、茶不但可以止渴，多喝还可以提高免疫力。夏天的时候，如果喝上一杯茶，会马上感觉很清凉很舒服的感觉。这是因为茶里面含有多酚、碳水化合物和氨基物等等起到的分散到身体的各个部位的作用，这些成份会静化唾液和身体。喝完后会保持新陈代谢平衡。另外喝茶还可以用于清洁口腔，早上起来喝上一杯喝，会让你保持一整天的食欲良好。
　　 3、茶还含有碘和氟化物，碘对治疗甲状腺机能亢进扮演着相当重要的角色。而氟则有利于骨胳、牙齿、头发和指甲。多喝茶可以防止牙齿腐烂。
　　 4、茶还可以起到促进消化的作用。如果一天当中吃太多了会感觉胃涨、胃痛，这时候喝上一杯浓浓茶，茶成分里面会产生胃酸促进消化系统。
　　 5、茶里面含有丰富的维生素，对身体起到一个保健的作用。 另外茶还可以吸取多余的脂肪，对身体肥胖的朋友，多喝可以起到减肥的作用哦！
　　 Tea Function:
　　 Tea is a natural and healthy drink. People have enjoyed drinking it for thousands of years. This tradition developed and remained popular to this very day. Nowadays, more than half the world 5 billions populations drink tea. Modern research indicates that tea contains a lot of nutrients that help to build up good health.
　　 1. Tea is refreshing and helps work efficiently.
Tea is a true stimulant, because of the caffeine it contains. Caffeine stimulates the central nervous system and blood circulation. It helps muscles relax and influences the metabolic process of all body cells. Tea also has an effect of blood vessel dilation and prevent from the cardiovascular and coronary diseases. Tea is used to cure angina pectoris and myocardial infarction. In clinics, tea is used to cure cold and headache with no averse side-effects. Caffeine is also contained in Aspirin tablets.
　　 2. Tea is a thirst quencher and aids digestion of food. In summer time, when tea is drunk, the comforting quality is felt at once. This is because of the polyphenols, carbohydrates, amino acid, etc. contained in tea reacted chemically with the saliva to result in dispersing the excessive body heat and purging toxins, promoting the waste disposal of the body. Metabolism keeps balance after drinking tea. Tea could be used as a mouth cleaner. One might feel thirsty and bitter taste when get up early in the morning. A cup of morning tea will clear mouth odor and any “gout?nbsp;feeling and promote appetite.
　　 3.Tea also provides iodine and fluorides. Iodine plays an important role in preventing hyperthyroidism. Fluoride is an ingredient of bone, teeth, hair and nails. Ten grams of tea used for making tea beverage every day are enough to meet the need of fluoride for human being and to prevent tooth decay.
　　 After a heavy meal, a cup of strong tea will stimulate the secretion of gastric juice and help digestion of food.
　　 The Vitamin groups such as inositol, folio acid, pantothenic acid etc. and compounds as methionine, thenylcyoteine, cholive, etc, contained in tea contribute to promote the fat metabolism.
　　 Aromatic substances contained in tea also aid to digestion of food and disperse unpleasant mouth odor since fat can be dissolved in aromatic substances. That’s why tea is more helpful to those who take meat and butter as their staple food. Green tea and antioxidants ...