Green tea and black tea are tea drinks, respectively, can give the body to supplement some nutrients, but there is no special efficacy, so the green tea or black tea is good argument is not scientific. Green tea main nutrients for carbohydrates and proteins, per 100g of green tea contains carbohydrates 50.3g, protein 34.2g, if you drink green tea can add some carbohydrates and proteins, is conducive to maintaining normal physiological activities. The potassium content of green tea is 1661mg/100g, so green tea is good for human body to supplement potassium. The proportion of carbohydrates in black tea is 59.2%, and the proportion of proteins is 26.7%. Black tea is a better choice for supplementing carbohydrates and proteins, but the content is limited. The potassium content of black tea is higher than that of green tea, which is 1934mg/100g. If you need to supplement potassium through food, black tea is a better choice. After fermentation, the tea polyphenols in black tea are fully oxidized, which reduces the irritation to the stomach, so black tea is more suitable for people with sensitive gastrointestinal tract. However, tea polyphenols have good antioxidant properties, and people who are not sensitive to tea polyphenols can choose to drink green tea. It should be noted that there are some differences in the nutrients provided by black tea and green tea, some nutrients black tea contains more, some nutrients green tea contains more, so the argument that green tea is good or black tea is not reasonable. In addition, drinking tea should be moderate, avoid drinking a large amount at once. Gastrointestinal function is not good for the crowd should not drink strong tea.