Rage-ohol

Metafilter user teleskiving, in a thread about anger:

"I am not a doctor, but I do know what it is like to experience episodes of irrational anger and in my case they were clearly brought on by diet. The culprits are caffeine and sugar, and the problems happen when they wear off. I have experienced almost no problems since I cut out caffeine altogether and the few times I have had an issue I think it can be traced back to withdrawal after a high dose of sugar."