1. Hypertension patients: coffee contains caffeine, it can make some sensitive patients blood pressure rise.
2. Renal failure patients: renal failure patients if there is hyperkalemia phenomenon, with the need to limit potassium diet, high potassium content in coffee should not be drunk.
3. Peptic ulcer patients: caffeine stimulates gastric acid secretion, and makes the digestive system smooth muscle blood vessels relax, accelerate the metabolism of food, and reduce the nutritional value of food.
4. Diabetes patients: caffeine can reduce insulin secretion in the pancreas, reduce glucose tolerance, increase insulin excretion and increase blood sugar.
5. Epilepsy patients: caffeine can stimulate the brain power center, xanthine will make vasoconstriction, reduce blood flow to the brain. It's bad for epilepsy.
6. Heart disease patients: coffee will increase fat and triglyceride content, increase the burden on the heart and oxygen consumption. side effects are more likely to occur especially when the body is tired and smoking excessively.
7. Iron deficiency anemia patients: coffee will accelerate the metabolism of food and reduce iron absorption rate.
8. Kidney stone patients: prevention of calcium oxalate stone recurrence, fasting food rich in oxalic acid, coffee is rich in oxalic acid food.
9. Insomniacs: long-term drinking coffee will affect the sedative effect, increase the number of times awake, so that the depth of sleep becomes shallow.
10. In addition to the above several diseases patients can not drink coffee, healthy people are not necessarily suitable for drinking coffee, such as pregnant women, lactating women: caffeine will affect the fetal nutrients and oxygen intake, so pregnant women had better not drink caffeinated beverages. If you drink coffee during lactation, caffeine and other stimulants will enter the baby's body through milk, which will have adverse effects on baby growth and development, so don't drink coffee for three months after delivery.
Athletes drinking coffee can also produce discomfort or pathological phenomena.
