Coffee drinkers should pay attention to calcium supplements at the same time.

Chinese people's daily food structure is lack of adequate calcium intake, coupled with the usual lazy exercise, so people who like to drink coffee should pay attention to calcium supplements. In addition, women after menopause, due to the lack of estrogen, drinking coffee will also cause calcium loss.

Adults who drink coffee regularly can get 100 milligrams of calcium a day, or at least one glass of milk a day to supplement calcium. Because, the content of caffeine in a cup of coffee is about 50 milligrams, for Chinese people who are deficient in calcium, they should pay attention to supplement calcium when drinking coffee.

Drinking the right amount of coffee can prevent gallstones

The reason why coffee is welcomed by some citizens is that it is refreshing. The caffeine in coffee stimulates people's central nervous system, making them more clear-headed, full of thinking ability and concentration, thus improving work efficiency. Therefore, when overwork and overtime stay up late, some citizens often use coffee as a necessary drink. Some experiments have shown that the average person absorbs 300 mg (about 3 cups of brewed coffee) a day will have a good effect on a person's mood.

In addition, other studies have shown that caffeinated coffee stimulates gallbladder contraction and reduces cholesterol, which is prone to gallstones in bile, and men who drink two to three cups of coffee a day are less than 40 per cent more likely to develop gallstones.

Never drink coffee on an empty stomach

Doctors remind members of the public not to drink coffee on an empty stomach, because coffee will stimulate gastric acid secretion, especially people with gastric ulcers should be more cautious. Coffee as a drink, drinking, according to individual circumstances, enough, generally speaking in nutrition or emphasis on a balanced diet and less use of spicy stimulating food.

In addition, it is worth noting that people with high blood pressure should avoid drinking caffeinated drinks during periods of stress at work. Because caffeine in coffee can lead to a rise in blood pressure, coupled with emotional tension, it can have a dangerous multiplication effect.

According to reports, studies have shown that blood pressure can rise for as long as 12 hours after drinking a cup of coffee.