Milk coffee "accompanied" can supplement calcium.

Zhang Nian said that Chinese people's daily food structure is already 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.

He suggests that adults who drink coffee regularly can supplement 100 milligrams of calcium a day, or at least drink a 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

Zhang Nian believes that coffee is popular among some citizens because it is refreshing and refreshing. The caffeine in coffee stimulates people's central nerves, making them more clear-headed, full of thinking ability, and focused, thus improving work efficiency. Therefore, when overworked 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

Doctor Zhang Nian reminded the public not to drink coffee on an empty stomach, as coffee can 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.