The brands from this section are the top products we recommend to our readers and the guys we are training. We’ve picked them because they’ve worked not only for the people from which we’ve received reviews from, but they’ve worked for us, as we are personally using each one of them. These are mostly pure testosterone boosters and multi-purpose products with testosterone boosting abilities and they are the best products in our personal opinion and are highly recommended by our team. Most of the products on this list usually provide a free sample, so you can try them before you are totally convinced that they are working for you.
Testosterone is significantly correlated with aggression and competitive behaviour and is directly facilitated by the latter. There are two theories on the role of testosterone in aggression and competition.  The first one is the challenge hypothesis which states that testosterone would increase during puberty thus facilitating reproductive and competitive behaviour which would include aggression.  Thus it is the challenge of competition among males of the species that facilitates aggression and violence.  Studies conducted have found direct correlation between testosterone and dominance especially among the most violent criminals in prison who had the highest testosterone levels.  The same research also found fathers (those outside competitive environments) had the lowest testosterone levels compared to other males.