Summary
A recent study in Spain found that an intake of 6 mg/kg of caffeine improved participants’ reaction times in a series of reaction tasks. It also made participants more nervous, alert, and active.
Participants did not know which dose was in the capsule they consumed. The order of doses (which dose was given in each trial) was randomized. Results showed that reaction time improved after the intake of 6 mg/kg of caffeine.
