Benefits of drinking coffee: Caffeine can stimulate the central nervous system and muscles, so it can refresh the spirit, enhance thinking ability and restore muscle fatigue. Acting on the cardiovascular system can improve heart function, relax blood vessels and promote blood circulation. For the gastrointestinal system, it can help digestion and help the decomposition of fat.
The disadvantage is that it has an exciting effect, which will add chaos when nervous, aggravate high blood pressure and lead to osteoporosis, especially for the elderly, patients with liver disease, patients with digestive system, pregnant women and babies.
Avoid smoking while drinking coffee, because the main component of coffee, caffeine, nicotine and other mutagenic substances in cigarettes can easily lead to abnormal changes in some tissues in the body and even lead to the production of cancer cells. ?
Second, avoid putting too much sugar: too much sugar can reflexively stimulate islet cells in the pancreas to secrete a large amount of insulin, while excessive insulin can reduce the glucose content in the blood. Once the blood sugar is too low, there will be hypoglycemia symptoms such as palpitation, dizziness and drowsiness. ?
Excessive concentration of three bogeys: it can lead to rapid heartbeat, obvious increase in blood pressure, and abnormal phenomena such as nervousness, anxiety and tinnitus.
When is the best time to drink coffee?
Drink coffee after or while eating, so as not to affect the absorption of minerals and other nutrients in food by the gastrointestinal tract.
Pay attention to calcium supplementation when drinking coffee.
Caffeine in coffee can hinder the absorption of calcium, and long-term drinking can cause osteoporosis and other diseases. Those who have the habit of drinking coffee should drink at least one glass of milk every day, or eat more calcium-containing foods appropriately.
Pregnant women should not drink coffee.
It has been reported that caffeine may cause fetal growth retardation, increase the risk of miscarriage, and even cause abnormal development and intelligence of newborns.
Coffee should not be drunk after drinking a lot.
Alcohol has a certain toxic effect on brain, heart, liver, kidney and other tissues. If you drink coffee after drinking, it will aggravate the damage of alcohol to human body, and its harmful effect is many times more than that of drinking alone.
Drink less sugar in coffee.
If you drink too much sugar in coffee, you will consume too many calories. If you drink this coffee for a long time, you will get fat.
Don't drink coffee before going to bed
Caffeine in coffee can make people excited, and drinking coffee before going to bed will keep you awake for a long time. Caffeine is found in many foods, including coffee, cola, tea and chocolate. Caffeine is one of the sources of bitterness and one of the mysterious charms of these foods. However, many people are not very clear about the effects of caffeine on health, except for being excited and refreshing.
Caffeine itself does not affect the absorption of nutrients, but it has a strong diuretic effect and promotes the excretion of nutrients that have been absorbed in the body with urine. That is to say, after drinking coffee, the urine volume will increase obviously, and the kidneys can't fully absorb the nutrients in the original urine into the blood as usual, so many important nutrients such as potassium, magnesium and vitamin B will be lost with the urine "leaking" out of the body.
At the same time, caffeine can effectively promote urinary calcium excretion, which may disturb the calcium balance of human body. If the normal calcium intake is not enough, or the food such as vegetables, beans and seaweed is not enough in the diet, and the acid-base balance tends to be acidic, then under the action of caffeine, the body's use of bone calcium is aggravated, which will bring the consequences of osteoporosis after a long time. For women over the age of 35 who begin to lose bone density, especially menopausal women, the impact can not be ignored.
In addition, people who are prone to cramps and edema, and women with dull skin, dark circles and excessive oil secretion should also strictly control the amount of coffee they drink, because the loss of minerals and vitamins will aggravate these symptoms.
Pregnant women should be cautious when drinking coffee, because coffee will increase the rate of spontaneous abortion in the fourth to sixth month of pregnancy, and at the same time increase the risk of giving birth to low birth weight babies. The fetus has almost no detoxification ability, so drinking coffee in pregnant women has a greater impact on the cardiovascular and neurobehavioral aspects of the fetus than herself. Breast-feeding mothers had better not drink coffee.
The latest research confirms that drinking 3 ~ 4 cups of coffee every day may reduce insulin sensitivity by about 15%. In order to control blood sugar within the normal range, the human body has to increase the secretion of insulin. This means that the human body's ability to control blood sugar is impaired, and the risk of developing type II diabetes is significantly increased. Therefore, people with a family history of diabetes and those who have begun to be obese in the waist and abdomen need to control the amount of coffee they drink, because they are high-risk groups of diabetes.
The nutrition and health survey also found that compared with non-coffee drinkers, coffee drinkers have higher blood lipid levels, five times higher adrenaline, lower elasticity of aorta, and higher risk of hypertension. Therefore, obese people and patients with hypertension should avoid drinking coffee. Tea is the source of caffeine, but it contains polyphenols, rich potassium, a variety of water-soluble vitamins and other beneficial substances, and does not contain carcinogens, which makes it healthier than coffee. Coke is an unhealthy drink, even if it does not contain caffeine, you should not drink too much.
Health advice
1. If you have no habit of drinking coffee, don't change it because the company provides free instant coffee.
If there are signs of coffee addiction, suddenly stopping drinking coffee may bring withdrawal symptoms, such as severe headache. It is recommended to gradually reduce the amount of drinking. People who can't quit coffee might as well drink decaffeinated coffee.
4. Try to avoid adding sugar and coffee partner when drinking coffee, because they will increase calorie intake. The hydrogenated vegetable oil contained in coffee partner is more harmful to cardiovascular health than coffee itself.
5. If you have already drunk coffee, you should refuse foods such as cola, refreshing drinks and chocolate to avoid excessive caffeine intake.
6. Pay attention to dietary balance, eat more foods rich in calcium, vitamins and dietary fiber, and reduce the adverse effects of coffee on nutritional balance.