Experts have warned that youngsters who drink too much coffee in their teens, could potentially turn out as nervous and timid adults.
According to researchers, just three cups of coffee daily may be enough to make teens cautious in later life, Metro.co.uk reported.
Dr Reto Huber, who led the research in Zurich, said that the brain of a child was 'extremely plastic' when maturing, and so could be vulnerable to effects from caffeine, which is also found in tea and fizzy drinks.
Scientists, who conducted the study on rats, claimed that the pubescent brain of both rats and humans matures rapidly during periods of deep sleep, but the process was shortened and disrupted in rodents that were given caffeine.
