London: The cup of coffee, latte or cappuccino that you drink every morning thinking it will wake you up is no of good, in fact, the stimulatory effects of the caffeinated drink is nothing more than an illusion, claim scientists.
Published online in the International Journal of Neuropsychopharmacology, the study reported that frequent drinkers of coffee develop a tolerance to both the stimulatory effects of caffeine and side-effects of increased anxiety.
According to tests on 379 individuals who abstained from caffeine for 16 hours before being given either caffeine in pill form or a placebo, little difference was seen in computer tests designed to gauge their alertness level, reports The Times.
While frequent consumers reported feeling alerted by a cup of coffee that contained about 70-100mg of caffeine, recent studies suggest that this is merely the reversal of the fatiguing effects of acute caffeine withdrawal.
Lead researcher Peter Rogers, at the University of Bristol, said that caffeine consumption was tied to increased anxiety and raised blood pressure, but did not improve test results.
“Our study shows that we don’t gain an advantage from consuming caffeine — although we feel alerted by it, this is caffeine just bringing us back to normal,” he said. “On the other hand, while caffeine can increase anxiety, tolerance means that for most caffeine consumers this effect is negligible.”