Scientists from Germany conducted another study aimed at studying the properties of coffee. As it turned out, the consumption of this drink is able to significantly improve a person's mood and productivity.
The data were confirmed in the experiment, with the participation of 66 volunteers elderly. Study participants were divided into two groups. The first group before testing drank a Cup of coffee, the second group received a placebo called "drink the tonic."
Next, the volunteers had to pass tests on intelligence and reaction speed. Not surprisingly, the first group coped with the tasks of 7% better. Scientists report that caffeine is a common stimulant brain substance increases efficiency and speed of response of the nervous system to external stimuli.