People who take in the caffeine equivalent of three cups of brewed coffee (or seven cups of instant) 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).

Read more at LiveScience.com

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