Defense Secretary Pete Hegseth has ordered everyone over 30 in the military to have their testosterone tested. That inspired us to rerun this classic episode where everyone at This American Life tested their testosterone and compared results. It did not lead to workplace harmony. Visit thisamericanlife.org/lifepartners to sign up for our premium subscription.

Prologue: Host Ira Glass talks with producer Alex Blumberg, who explains that he wanted to do this show because of his conflicted relationship with his own testosterone. He tells Ira that the reasons go back to a girl in his 8th-grade homeroom. We also hear from a man who stopped producing testosterone due to a medical treatment, and found his entire personality was altered. (10 minutes)
Act One: What’s it like to get injected with testosterone? When Griffin Hansbury transitioned, he got massive shots of it and was surprised at the effect it had on him. (17 minutes)
Act Two: The men and women on staff at This American Life decide to get their testosterone levels tested to see who has the most and least, and whether personality traits actually match hormone levels. (13 minutes)
Act Three: What happens when a man suddenly loses all of his testosterone? We return to Alex Blumberg’s interview from the top of the show with a man who that happened to. He says life without testosterone is life without desire. By that he doesn’t mean sexual desire. He means any desire. (6 minutes)
Act Four: Novelist Miriam Toews interviews her 15-year-old son, someone at an age when boys experience a jolt of ten or twenty times the testosterone they had as children, about all the things she doesn’t understand about what he’s going through. (11 minutes)

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