Male sweat, and one particular chemical in male sweat, is known to influence women's moods and even increase their sexual arousal. A 2007 study by Claire Wyart at UC Berkeley shows that the chemical androstadienone in male sweat also boosts levels of the hormone cortisol in women who sniff it. These findings suggest that androstadienone may be a human pheromone, causing both behavioral and hormonal changes in women.⁠ ⁠ _____⁠ ⁠ ⁠ #science #biology #underarm #sweat #chemical #androstadienone #pheromone #hormonal