The data on testosterone and aggression comes primarily from rat data....a flawed model for predicting human behavior.
How about caffeine rage????
A regular drip venti Starbucks coffee has 480mg of caffeine. According to this study 455mg of caffeine is enough to increase aggressiveness in a 200 pound male(5mg/kg).
Psychol Rep. 2000 Jun;86(3 Pt 1):941-6. Related Articles, Links
Effects of low doses of caffeine on aggressive behavior of male rats.
Wilson JF, Nugent NR, Baltes JE, Tokunaga S, Canic T, Young BW, Bellinger ER, Delac DT, Golston GA, Hendershot DM.
Psychology Department, Wittenberg University, Springfield, OH 45501, USA.
[email protected]
To date, the effect of low doses of caffeine on aggression has not been systematically examined. Doses of caffeine greater than 30 mg/kg appear to reduce social interaction and aggression in all species studied. In a double blind study of the effects of low doses of caffeine on aggression, rats were housed four per cage, and aggressive behavior against an intruder was recorded during baseline and following administration of 2.5, 5, 10, and 20 mg/kg caffeine. Aggressive behavior was significantly increased following administration of the higher doses of caffeine. Doses of 5, 10, and 20 mg/kg caffeine all were effective in increasing pushing behavior, whereas doses of 5 and 10 mg/kg were most effective in increasing boxing behavior, and a dose of 10 mg/kg was significantly more effective than other doses in increasing chasing and roll-tumble-bite behaviors. Based on these results and other published reports, the inverted-U shaped dose-dependent effect of caffeine on aggression appears to apply,
with aggressive behavior being most elevated following doses of 5-20 mg/kg caffeine, less elevated following 2.5 mg/kg or 30 mg/kg, and significantly reduced with doses above 40 mg/kg and at doses below 2.5 mg/kg.