Androstenone (5a-androst-16-en-3-one) is a pheromone steroid found in human sweat
Androstenone odour smells different to different people with reported smells to be from urine, sweaty to even a pleasant scent. Some people cannot detect the odour of -none at all. Approximately 40% of adult females cannot detect the odour . . . It has been known that people initially unable to smell the pheromone can actually learn to detect it after repeated exposure to the smell.
In humans androstenone pheromones are thought to be the main pheromone that gives men the alpha-male characteristics. More alpha males therefore are thought to produce more androstenone naturally by their bodies than less alpha males.


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