 Considerable amounts of androstenol are present in human urine, and it is also present in the blood plasma and saliva of humans and pigs as well as in the axillary sweat of humans.Due to its ability to cross the blood-brain-barrier, androstenol is likely present in the central nervous system as well.Androstenol, similarly to the related endogenous steroids 3α-androstanediol and androsterone, has been found to act as a potent positive allosteric modulator of the GABAA.