It is best to drink coffee after breakfast and lunch, because it can promote the peristalsis of the stomach, help digestion and break down the high-calorie and high-fat food you eat, and will not stimulate the stomach like drinking coffee on an empty stomach. It is best not to drink coffee after meals, for fear of affecting sleep. If you want to stay up late by drinking coffee, you may unconsciously drink too much, which is not good for your health.

When you're nervous, it makes things worse.

Caffeine helps to improve alertness, sensitivity, memory and attention. But if you drink more coffee than you are used to, you will have the same dose of stimulants, which will cause tension. For people with anxiety tendency, caffeine can aggravate the symptoms of sweating, palpitation and tinnitus.

Aggravate hypertension

Caffeine is often combined with other simple painkillers because of its analgesic effect. However, if you take a lot of caffeine for a long time, if you already have high blood pressure, using a lot of caffeine will only make your situation worse. Because caffeine alone can raise blood pressure, if combined with emotional tension, it will have a dangerous multiplier effect. Therefore, people at risk of hypertension should especially avoid drinking caffeinated drinks when working pressure is high. Some people who drink coffee all the year round think they are immune to the effects of caffeine, but this is not the case. A study shows that after drinking a cup of coffee, the blood pressure can rise for as long as 12 hours.

Induced osteoporosis

Caffeine itself has a good diuretic effect. If you drink a lot of coffee for a long time, it will easily lead to bone loss, which will adversely affect the preservation of bone mass and may increase the threat of osteoporosis in women. However, the premise is that people who usually have insufficient calcium intake in food, or people who don't exercise often, and postmenopausal women, due to insufficient estrogen, calcium loss, coupled with a large amount of caffeine, may pose a threat to bones. If you can enjoy it in a reasonable amount, you can still do it without choking.

These people drink coffee carefully.

Caffeine intake in patients with liver disease will prolong the time of caffeine in the body. It takes 2 hours for normal adults to metabolize caffeine, but it may take 4-5 hours for patients with liver disease or liver insufficiency. Therefore, patients with liver disease must be careful when drinking coffee, and it is best not to drink it after the evening, so as to avoid the long metabolism time affecting sleep, and it is best not to exceed 1 cup a day.

Patients with digestive diseases believe that people who often have stomachaches and stomach problems have an experience, and doctors will definitely tell them not to eat irritating foods, including wine, peppers, coffee, tea and carbonated drinks. Coffee is one of them, because its tannic acid can stimulate gastric acid secretion. If you are a patient with acute digestive system diseases, you must avoid drinking it. After recovery, if you drink coffee occasionally, it is best to use it after meals to avoid drinking coffee on an empty stomach.

According to the research of milk nutrition experts at home and abroad for many years, drinking a glass of milk every day has at least 13 benefits for human body.

1. Potassium in milk can keep arterial blood vessels stable under high pressure and reduce the risk of stroke;

2. Milk can prevent the human body from absorbing toxic metals such as lead and cadmium in food;

3. Yogurt and fat can enhance the immune system function and prevent the growth of tumor cells;

4. Iron, copper and lecithin in milk can greatly improve the working efficiency of the brain;

5. Calcium in milk can strengthen bones and teeth and reduce the occurrence of bone diseases;

6. Iron, copper and vitamin A in milk have cosmetic effects;

7. Tyrosine in milk can promote the growth of hormone-serotonin;

8. Magnesium in milk can make the heart anti-fatigue;

9, zinc in milk can make the wound heal faster;

10, vitamin B in milk can improve vision;

1 1, drinking milk can prevent arteriosclerosis;

12, milk contains high calcium and is well absorbed;

13. Drinking milk before going to bed helps you sleep.

1. It is not advisable to drink milk on an empty stomach in the morning. Because the gastrointestinal peristalsis is fast when the human body is on an empty stomach, the nutrients in milk often rush into the large intestine before being absorbed. In addition, the method of swallowing milk is not feasible, because it will reduce the chance of mixing with saliva in the mouth, which is not conducive to digestion and absorption. You'd better eat some biscuits, cakes, etc. Before drinking milk, or eating snacks while drinking milk. Drinking milk at night is more beneficial. Scientific research has found that there is a special law of calcium metabolism in human body: at night, especially at midnight, the plasma calcium content will appear a "trough", forcing the body to transport part of calcium in bones to supplement it through regulation mechanism. Although this temporarily maintains the calcium in the blood, the calcium in the bones is reduced. Milk is rich in calcium. Drinking a glass of milk before going to bed can compensate the body's demand for calcium at night. Milk should not be cooked with sugar. Milk is rich in amino acids. At high temperature, lysine in milk reacts with sugar to produce a new compound-fructosyl amino acid. This substance can't be digested and absorbed by human body, but it affects human health. It is best to drink fresh milk. If it is too cold, you can heat it a little.