Coffee has many components, which contain caffeine, tannic acid, acidic fat, protein, sugar, iron, and minerals such as phosphorus, which has the effect of refreshing and relieving fatigue. But women a day a cup of coffee may cause some harm, may cause anemia, osteoporosis, gastrointestinal discomfort, hypertension, sugar, and other problems, and pregnant women and lactating women are not recommended to drink, easy to affect the normal development of the fetus, menstruating women are also recommended not to drink, easy to cause dysmenorrhea. 1, anemia: tannic acid in coffee will affect the absorption of iron, long-term consumption of coffee will lead to the body’s iron Absorption is not enough, easily triggered by female iron deficiency anemia; 2, osteoporosis: coffee has a diuretic effect, but caffeine can combine with the body’s free calcium, and excreted by urine, the less free calcium will cause the breakdown of calcium binding, for women, especially perimenopausal women, drink a lot of coffee every day will lead to osteoporosis; 3, gastrointestinal discomfort: coffee contains caffeine will stimulate the gastrointestinal tract mucosa If women with poor gastrointestinal function drink coffee every day, it is easy to cause gastrointestinal discomfort; 4, hypertension: excessive daily consumption of coffee, the presence of large doses of caffeine in the body will excite the heart, so that the heart rate is accelerated, if coupled with emotional excitement, easily lead to increased blood pressure; 5, sugar: If women suffer from diabetes, and coffee in the process of making may add milk, sugar, etc., the sugar in it. sugar, etc., the sugar can make women’s blood sugar rise, aggravate diabetes or even induce complications of diabetes. In addition, coffee is addictive, anxious, depressed women who drink a cup of coffee a day, there will also be palpitations, tinnitus, sweaty palms performance. Therefore, it is not recommended that women drink a cup of coffee a day, intermittent moderate intake, in order to play a positive role of coffee.