These kind of studies bug me, but nonetheless, I do know that caffeine can be extremely destabilizing and sometimes (like for me) at much smaller doses than this study indicates.
People who drink at least 330 milligrams of the stimulant a day were three times as likely to have hallucinations as those who consumed less than 10 milligrams a day, Durham University researchers found in a study of 219 college students published today in Personality and Individual Differences.
The study, the first to link caffeine and hallucinations, explored the relationship between high caffeine consumption and an increased release of cortisol, a stress hormone believed to contribute to delusions, lead researcher Simon Jones said. It forms the first step toward examining nutrition as a factor in the occurrence of hallucinations, he said.
“Given the link between food and mood, and particularly between caffeine and the body’s response to stress, it seems sensible to examine what a nutritional perspective might add,” Jones said in a statement. (read the rest of the article)