The second theory is similar and is known as "evolutionary neuroandrogenic (ENA) theory of male aggression".   Testosterone and other androgens have evolved to masculinize a brain in order to be competitive even to the point of risking harm to the person and others. By doing so, individuals with masculinized brains as a result of pre-natal and adult life testosterone and androgens enhance their resource acquiring abilities in order to survive, attract and copulate with mates as much as possible.  The masculinization of the brain is not just mediated by testosterone levels at the adult stage, but also testosterone exposure in the womb as a fetus. Higher pre-natal testosterone indicated by a low digit ratio as well as adult testosterone levels increased risk of fouls or aggression among male players in a soccer game.  Studies have also found higher pre-natal testosterone or lower digit ratio to be correlated with higher aggression in males.     
One caution that I have is that I tried for years to raise my testosterone through lifestyle changes, . diet, sleep, supplements, etc., and nothing budged my testosterone. And I see this quite often on The Peak Testosterone Forum : some men seem to have actual damage to some part of their HPT (hypothalamus, pituitary and testes) axis. In those cases, going natural just does not work for reasons that we do no understand yet. Of course, it does not hurt to try, and I especially encourage the younger men to do that.
Mike Geary, Certified Nutrition Specialist
and Dr. Richard Cohen, .
. One last thing. And it could be important for some guys.
Have you ever thought about whether as a general rule, you’re an alpha male or a beta male?
What if I told you alpha male characteristics and qualities are more pronounced when men have optimal testosterone levels?
Makes sense, doesn’t it?
Listen, having optimal and balanced sex hormones is one of those deciding advantages in social situations. Just ask your wife or girlfriend.
So am I claiming Truth About Testosterone will turn you into a alpha male?
Maybe, maybe not. But try it and see, ok? You have my 60-day guarantee, so there’s no risk.
I encourage you to secure your copy of Truth About Testosterone plus the bonuses at this discounted introductory price while you can.