Portrait of a man from Louisiana (MODEL) who is considering testosterone replacement therapy.

Will Testosterone Therapy Make Me Angry?

Millions of people—such as bodybuilders and cheating athletes—enhance their natural testosterone levels to boost their muscle mass, confidence, energy, and performance. When used this way, without proper medical supervision, testosterone has been linked to unwanted side effects such as mood swings and aggressive "roid rage."   The Testosterone-Aggression Link: Not So Simple Is this connection real, or is the idea …

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