Eight kinds of people who can't drink coffee.

1. High blood pressure: coffee contains caffeine, which can raise blood pressure in some sensitive patients.

two。 Renal failure: if patients with renal failure have the phenomenon of hyperkalemia, they need to cooperate with a limited potassium diet, and the coffee contains high potassium.

3. Peptic ulcer: caffeine stimulates gastric acid secretion and relaxes the smooth muscle vessels of the digestive system, accelerating food metabolism and reducing the nutritional value of food.

4. Diabetes: caffeine can reduce insulin secretion in the pancreas, reduce glucose tolerance, increase insulin excretion and increase blood sugar.

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

6. Iron deficiency anemia: coffee accelerates food metabolism and reduces iron absorption.

7. Kidney stones: to prevent recurrence of calcium oxalate stones, abstain from foods rich in oxalic acid, and coffee is a food rich in oxalic acid.

8. Insomnia: long-term drinking coffee will affect the sedative effect, increase the number of waking times, so that the depth of sleep becomes shallow. In addition to the above patients can not drink coffee, healthy people may not be suitable for drinking coffee, such as pregnant women, breast-feeding women, athletes and other drinking will produce bad feelings or pathological phenomena.