It is easy to lose many nutrients when drinking coffee.

Many women regard coffee as a refreshing and refreshing helper, but did you know that coffee not only increases your body's estrogen levels, but also causes nutrient loss due to diuretic effects.

Coffee can raise estrogen levels.

Fan Zhihong, an associate professor in the Department of Nutrition and Food Safety at the School of Food at China Agricultural University, pointed out that studies have shown that coffee has a strong effect on increasing estrogen. Women who drink 4-5 small cups of coffee a day will consume more than 500 milligrams of caffeine. Their estradiol levels rise by as much as 70% during the follicular phase of the menstrual cycle (1-5 days after the onset of menstruation), when high levels of estrogen are particularly dangerous. Studies have found that drinking just two cups of coffee from a small coffee cup can significantly increase estrogen levels. The more you drink, the higher the level of estrogen.

Many women know that high levels of estrogen increase the risk of breast and endometrial cancer, as well as endometriosis and breast pain. Therefore, women with these troubles should drink less coffee. Women with a family history of breast and ovarian cancer should be extra careful and pay more attention to controlling their estrogen levels.

Coffee can easily cause osteoporosis.

Fan Zhihong also warned that caffeine itself does not affect the body's absorption of nutrients, but it has a strong diuretic effect. Therefore, after drinking coffee, the urine volume of drinkers will increase significantly, so potassium, magnesium, vitamin B and other important nutrients will be lost as the urine flows out of the body.

At the same time, caffeine effectively promotes urinary calcium excretion, disrupting the body's calcium balance, and the body has to use bone calcium, which will lead to osteoporosis over a long period of time. Experts stress that for Chinese people who already have insufficient calcium intake, the impact can not be ignored.

Women who are prone to cramps and edema, as well as women with dark skin, dark circles and excessive oil secretion, should strictly control the amount of coffee they drink, as the loss of minerals and vitamins can aggravate these symptoms.

Coffee harms the health of fetuses and babies

Coffee can cross the placental barrier and enter the milk. This means that it can be passed from mother to fetus through the umbilical cord or from mother to baby through breast milk.

So experts warn that pregnant women should never drink coffee because it increases the rate of natural abortion in the 4th to 6th months of pregnancy and increases the risk of giving birth to low birth weight babies. The fetus has little ability to detoxify, so drinking coffee from a pregnant woman has a greater impact on the cardiovascular and neurobehavioral aspects of the fetus than on the mother.

Babies are much less capable of detoxification than adults, so they are very sensitive to caffeine. High doses of caffeine may reduce the weight of the baby's brain, reduce learning and memory, and have a lifelong effect on IQ. Some mothers and children are particularly sensitive to caffeine and the damage is even greater. Therefore, nursing mothers had better not drink coffee.

Gradually reduce coffee consumption

In addition to coffee, tea, cola, chocolate, refreshing drinks also contain caffeine, the total caffeine intake of these foods should not be ignored. Each small cup of instant coffee contains about 75 milligrams of caffeine, a pick-me-up drink can contain more than 80 milligrams, and a can of Coke or a medium-sized chocolate contains about 40 milligrams.

Experts also warn that coffee cultivation uses a large number of pesticides, and there may be more pesticide residues in its beans.

So experts suggest that if there are already signs of coffee addiction, abruptly stopping drinking coffee may cause withdrawal symptoms, such as severe headaches. It is recommended to gradually reduce the consumption to 1-2 cups a day. Women who can't quit coffee might as well drink decaf coffee. When drinking coffee, try to avoid adding sugar and coffee companions, as they will increase calorie intake. If you have already drunk coffee, you should reject cola and refreshing drinks and avoid consuming too much caffeine.