Tea depends on the amount of tea drinking habits, age, State of health, living conditions, customs, and other factors. Generally healthy adults usually have tea-drinking habit, tea about 12 grams a day, 3-4 BREW is appropriate. For large amount of manual labor, people who consumed, food intake, especially people with high temperature environments, exposure to toxic substances, day 20 grams of tea drinking is also appropriate. Greasy food more, smoke, alcohol can also increase tea consumption. Pregnant women and children, neurasthenia, tachycardia, tea consumption should be reduced.