Drinking a normal amount of coffee is not harmful to the stomach. But don't drink coffee on an empty stomach, because coffee will stimulate gastric acid secretion, especially for patients with gastric ulcer. Patients with stomach trouble-drinking too much coffee will make stomach trouble worse.

Experiments show that it is beneficial for normal people to consume 300 mg (about 3 cups of brewed coffee) of caffeine every day. Caffeine can promote renal function, expel excess sodium ions from the body, increase urine output, improve abdominal distension and edema, and help to lose weight. Black coffee is more diuretic.

1. Patients with low blood pressure can get better by drinking a cup of black coffee every day. In the process of brewing coffee at high temperature, it will also produce an antioxidant compound, which is helpful for anti-cancer, anti-aging and even prevention of cardiovascular diseases, and can be comparable to fruits and vegetables.

2. Coffee can increase high-density cholesterol, accelerate the metabolism of bad cholesterol, reduce coronary atherosclerosis and reduce the probability of stroke.

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