Actually they have higher levels estrogen than other races.
Nope - they do have higher T. that's why they get ripped so much more easily.
After these adjustments were made, blacks had a 15% higher testosterone level and a 13% higher free testosterone level.
You are citing a study that does not look at estrogen. It's the higher estrogen that leads to the irrational behavior. It's the higher testosterone that leads to a combined aggressive and irrational action.
It's the higher estrogen that leads to the irrational behavior.
I can't answer to that side, and as I mentioned in a couple other replies, the higher testosterone doesn't seem to be significant enough to cause the increase aggression. Others pointed out the smaller pre-frontal cortex as a cause. You've mentioned the increased estrogen. In all likelihood, it's a combination of many things.
I replied mostly to point out that they do have higher T, and that I wasn't completely off in my recollection :)
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