Is coffee exhilarating or psychological?

The volunteers were randomly divided into two groups: the first group drank caffeinated coffee but learned that it contained no caffeine; the second group drank decaffeinated coffee but learned that it contained caffeine. The evaluation showed that people who regularly drank caffeinated drinks were as excited as those who rarely drank coffee after drinking a placebo.

Many people like to drink a cup of coffee in the morning in order to cheer up and start a busy day. Refreshing coffee in the morning may just be psychological, British researchers have found.

The effect of coffee is not obvious.

Researchers at the University of East London recruited 88 volunteers, aged between 18 and 47, who love coffee and drink at least two cups a day.

The volunteers were randomly divided into two groups: the first group drank caffeinated coffee but learned that it contained no caffeine; the second group drank decaffeinated coffee but learned that it contained caffeine. The researchers then asked volunteers to take a series of tests to assess their intellectual performance, reaction time and emotions.

The results showed that compared with those before drinking coffee, the first group of volunteers performed better in the color discrimination test, but the reaction speed was not faster; the second group of volunteers improved both in terms of color resolution and reaction speed.

Or it comes from psychological expectation.

In a report published in the journal hobby, the researchers concluded that coffee's pick-me-up may stem from psychological expectations.

The Daily Mail quoted researchers as saying on the 2nd: "this finding shows that the expectation of caffeine consumption increases sustained attention, and the effect is comparable to or even better than the effect of caffeine."

Previous studies have examined whether a cup of coffee in the morning is good for coffee lovers. Researchers have found that people who regularly drink caffeinated drinks such as coffee gradually develop "resistance" to caffeine stimulation.

The researchers studied 379 adults, half of whom never or rarely drank caffeinated drinks, while the other half regularly drank such drinks. They did not drink caffeinated drinks for 16 hours, followed by coffee or a placebo with no actual effect. The evaluation showed that people who regularly drank caffeinated drinks were as excited as those who rarely drank coffee after drinking a placebo.