People who are not suitable for drinking coffee and taboos

Drinking a moderate amount of coffee can not only eliminate fatigue and drowsiness, but also cheer up and improve the thinking function of the brain. However, drinking coffee is fastidious, generally speaking, we should pay attention to the following three points.

Avoid putting too much sugar in it. Drinking coffee with the right amount of sugar can make the coffee taste better. But if you put too much sugar, it will make people lethargic, and even make people feel very tired. There are two reasons: first, when caffeine enters the body, it consumes certain minerals that are indispensable to the conversion of carbohydrates into glucose. Second, when drinking coffee, adding too much sugar will stimulate the islet cells in the pancreas to secrete a large amount of insulin, while excessive insulin will reduce the glucose content in the blood. Once the blood sugar is too low, there will be palpitations, dizziness, weakness in the limbs, drowsiness and other hypoglycemic symptoms. In addition, when drinking coffee, it is not appropriate to eat too much food with high sugar content, otherwise it will also produce the above phenomenon.

Second, the concentration is too high. After drinking high concentration of coffee, adrenaline in the body increases sharply, resulting in a faster heartbeat, a significant increase in blood pressure, and abnormal phenomena such as nervousness, restlessness, tinnitus, involuntary trembling and so on. If there is arrhythmia, tachycardia, neurosis and other diseases, drinking espresso will promote or aggravate the original condition. People with coronary heart disease and high blood pressure, such as excessive drinking of espresso, will induce angina pectoris and cerebrovascular disease. Generally speaking, the concentration of caffeine in each cup of coffee should not exceed 100 mg, and the amount of caffeine consumed should not exceed two cups a day.

Third, avoid smoking while drinking coffee. Studies have shown that caffeine, the main component of coffee, under the action of nicotine and other mutagenic substances in cigarettes, it is easy to mutate some tissues in the body, and even lead to the production of cancer cells.

People who are not fit to drink coffee

1. If patients with renal failure have hyperkalemia, they need to cooperate with limited potassium diet, and the content of potassium in coffee is high.

2. Peptic ulcer caffeine stimulates gastric acid secretion, relaxes the smooth muscle vessels of the digestive system, accelerates food metabolism and reduces the nutritional value of food.

3. Diabetic caffeine can reduce insulin secretion in pancreas, reduce glucose tolerance, increase insulin excretion and increase blood sugar.

4. Epileptic caffeine can stimulate the brain power center, and xanthine can constrict blood vessels and reduce blood flow in the brain. It is very disadvantageous to patients with epilepsy.

5. Heart disease coffee will increase the content of fat and triglycerides, increase the burden of the heart and oxygen consumption. Especially when the body is tired and excessive smoking is more likely to cause.

6. Iron deficiency anemia coffee will accelerate food metabolism and reduce iron absorption.

7. Kidney stones prevent recurrence of calcium oxalate stones by fasting foods rich in oxalic acid, and coffee is a food rich in oxalic acid.