People who take in the caffeine equivalent of three cups of brewed coffee are more likely to hallucinate, a new study suggests.
The researchers found that people with a caffeine intake that high, whether it came from coffee, tea, chocolate or caffeinated energy drinks or pills, had a three-times-higher tendency to hear voices and see things that were not there than those who consumed the equivalent of a half-cup of brewed coffee (or one cup of instant coffee).
A Chiropractor's Opinion 