It is said on the Internet that "drinking coffee is not refreshing". Is it true?

Recently, there is a saying circulating on the Internet: "drinking coffee is not really refreshing."

CCTV Web feature (Reporter Chen Haining and Shen Wei) drinking coffee is a way for many people to relieve drowsiness. In people's opinion, coffee can stimulate the central nervous system, heart and respiratory system because it contains caffeine. It can relieve fatigue and refresh the mind. Recently, however, there is a saying circulating on the Internet: "drinking coffee is not really refreshing." So, is this statement true?

Netizen: still sleepy after drinking coffee

The reporter found that there are not a few people who think that drinking coffee has no refreshing effect, and many netizens have also questioned the "refreshing effect of coffee".

"Coffee is a drink, and it doesn't cheer me up at all." During the 2014 World Cup, when Mr. Duan, a fan of Changchun, was woken up by the alarm every day, the first thing he did was to make a cup of instant coffee, hoping to dispel drowsiness. But a cup of coffee into the stomach, and finally will unwittingly fall asleep.

Miss Yu from Nanjing also thinks that the refreshing effect of coffee is not obvious. Miss Yu said: "the caffeine in the coffee is not purified and the content is not high, so it has no refreshing effect. Nowadays, many drinks also contain caffeine. Why doesn't anyone say that drinking drinks can cheer you up? "

The reporter found that there are not a few people who think that drinking coffee has no refreshing effect, and many netizens have also questioned the "refreshing effect of coffee".

British Research Test: caffeine does not improve the mind much

Experiments conducted by the University of Bristol in the UK have shown that caffeine intake has little effect on mental health.

Can coffee cheer you up or not? The University of Bristol in the UK tested 379 volunteers and found that caffeine intake had little mental improvement.

In the test, half of the people who never or rarely drank caffeinated drinks and those who drank them regularly did not drink caffeinated drinks for 16 hours. They were then asked to drink coffee or a placebo with no actual effect, and were tested for the response. It turned out that caffeine intake did not improve the spirit much. Caffeine increased alertness, but it only brought people back to normal feeling. Therefore, after drinking a cup of coffee in the morning, I feel refreshed because of the fatigue caused by the recovery of metabolism at night. The study also found that long-term use of coffee makes people more likely to feel tired.

Medical experts: the stimulating effect of different caffeine content is limited

Li Yuanyang, a member of the Neurosurgery Branch of the Nanjing Medical Association and an expert in brain neurosurgery, said that the caffeine content in ordinary coffee drunk by ordinary people is not high, so the stimulating effect is also very limited.

Studies have shown that there is more caffeine in tea than coffee at the same weight, and the longer the tea is brewed, the more caffeine it contains, and the caffeine content in coffee varies greatly. A study published in the Journal of Analytical Toxicology found that 16 ounces of coffee from a famous brand contained 100 milligrams more caffeine than other coffees of the same amount. Research also shows that even the same brand of coffee, each bottle of caffeine content also varies, in general, a 16-ounce cup of standard coffee contains caffeine ranging from 90 milligrams to 225 milligrams, up to 300 milligrams.

Li Yuanyang, a member of the Neurosurgery Branch of the Nanjing Medical Association and an expert in brain neurosurgery, said that the caffeine content in ordinary coffee drunk by ordinary people is not high, especially the instant coffee on the market, and everyone needs different precise doses of caffeine that can produce results, so the stimulating effect is also very limited.

Coffee Association: the refreshing effect varies from person to person.

Recently, the reporter called the Fujian Coffee Industry Association. The staff said that the refreshing effect of coffee is related to many factors, not only from person to person, but also to intake, drinking habits, and even mood.

"caffeine is considered to be the main mental stimulation ingredient in coffee, but this is not the case." According to the 101 reasons for Coffee innocence, coffee contains only a small amount of caffeine, and the antioxidant chlorogenic acid is more abundant, and the final caffeine content of each cup of coffee varies, the staff member told reporters. Usually one cup of coffee contains 100-150 milligrams of caffeine, while the dose of two to four cups of coffee can reduce drowsiness.

Thus it can be seen that the sensitivity and tolerance of the human body to caffeine in coffee are different, so the refreshing effect of coffee will be different. From this point of view, there is some truth in the saying that "drinking coffee is not refreshing." Relevant experts warn that coffee should not be used as breakfast. Drinking coffee on an empty stomach stimulates the intestines and stomach, which will affect the function of the gastrointestinal tract.