Testosterone

Parenting children is linked to lower testosterone in men. New research shows these hormonal shifts continue past the toddler years but remain within a healthy range.

A study in Evolution and Human Behavior reports that men with higher testosterone levels have body odor perceived as more dominant, providing evidence that humans respond to chemical signals regarding social rank.

New research finds that the hormone testosterone alters the mental calculations men use to learn from negative outcomes, enhancing self-protection with indirect consequences for their decisions involving others.

In the largest study of its kind, scientists found testosterone does not influence men's economic behavior. A dose of the hormone failed to change how men approached choices involving risk, fairness, and competition.

A new study suggests testosterone can influence how men respond in social conflicts. When given testosterone gel, participants were more likely to mimic cooperation or defection—and to react emotionally—during a variant of the classic Prisoner’s Dilemma game.

A new study suggests that fairness decisions in adolescence are shaped by the interaction between testosterone and cortisol. The findings reveal that older teens, especially boys, tend to favor friends over strangers in strategic contexts when hormone levels align.

A study of dementia patients with behavioral symptoms suggests testosterone can have opposite effects on the brain. Higher levels of the hormone were linked to declining cognitive performance but also to improvements in symptoms such as depression and nighttime disturbances.

New research reveals that greater muscular strength and higher testosterone levels are associated with fewer brain white matter abnormalities. The findings highlight potential strategies for preventing stroke and dementia through physical fitness.

Men with high testosterone and low cortisol may feel less stressed in social situations, while those with high cortisol and low testosterone also show resilience, according to new research that highlights how hormone interactions shape emotional responses to stress.

Adolescents were more likely to trust friends than strangers, and this trust was linked to differences in cortisol, testosterone, impulsivity, and theory of mind, suggesting that both hormones and cognitive traits may shape social decision-making during early adolescence.

What if the key to swaying a swing voter lies in their biology? New research found giving testosterone to weakly affiliated Democratic men made them less loyal to their party and more open to Republicans, revealing a potential hormonal link...

A new study suggests testosterone makes men more emotionally responsive to social approval and rejection. The hormone increased how much feedback from others influenced momentary self-worth, offering insights into how biology shapes the way people perceive social acceptance.

Testosterone may boost the brain’s emotional radar, according to a new study linking the hormone to stronger neural reactions to both social inclusion and exclusion.

Can a testosterone boost turn you into a risk-taking, competition-loving alpha? Not so fast. Two large studies suggest the hormone has little to no effect on men’s confidence, competitiveness, or risk-taking behavior.

A new study shows that a single testosterone dose or brief stress event can be detected in hair weeks later, demonstrating how hair captures hormonal changes.