Even though there are many testosterone booster benefits, people often ask do testosterone boosters really work?. The biggest is that frequent users sometimes experience ''Roid rage'' Roid rage is a phrase used to describe the heightened aggression that comes with high levels of testosterone in the body. Many people who use it might experience a mild increase in aggressiveness. Many users, however, are able to use this energy beneficially by channeling the extra energy into activities like training harder in the gym or exercising more.
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.     
Copyright © 2017 HealthDay. All rights reserved. SOURCES: Thomas Gill, ., professor, geriatrics, Yale University, New Haven, Conn.; Bradley Anawalt, ., professor, endocrinology, University of Washington, Seattle, and member, The Endocrine Society's leadership council; Stephen Houser, ., American Heart Association president and senior associate dean, research, Temple University, Philadelphia; Sergei Romashkan, ., ., chief, clinical trials branch, division of geriatrics and clinical gerontology, . National Institute on Aging; Feb. 21, 2017, Journal of the American Medical Association ; Feb. 21, 2017, JAMA Internal Medicine