Who is not fit to drink coffee?

Some people rely on high concentrations of coffee to stimulate the brain for a long time, which is not necessarily good. According to research, after drinking high concentration of coffee, the adrenal gland accumulates in the body, resulting in faster heartbeat, higher blood pressure, nervousness, tinnitus and involuntary foot tremor. Therefore, the concentration of coffee must not be too high. The total amount of caffeine consumed by healthy adults should not exceed 250 mg per day, that is, 2-3 cups of coffee.

People with hypertension, coronary heart disease, arteriosclerosis and other diseases: normal people drinking coffee for a long time or in large quantities will increase the content of cholesterol in the body and cause cardiovascular disease, so people with cardiovascular disease obviously should not drink coffee.

Older women: coffee reduces the amount of calcium the body needs, leading to osteoporosis. Women need more than 10 times more calcium every day after menopause than before menopause. If older women often drink coffee, they are prone to fractures.

Patients with stomach problems: people with stomach problems drink little or no coffee as much as possible, because drinking too much coffee can lead to the deterioration of stomach problems.

Pregnant women: pregnant women drink too much coffee, which can lead to fetal malformation or miscarriage.

Vitamin B1 deficiency: vitamin B1 plays an important role in maintaining the balance and stability of the nervous system, while coffee has a great destructive effect on vitamin B1.

Cancer patients: drinking too much coffee is a cancer risk for normal people. Although the link between caffeine and cancer has not yet been confirmed, it is better for people who already have cancer not to drink coffee.