Androstenol, also known as 5α-androst-16-en-3α-ol (shortened to 3α,5α-androstenol or 3α-androstenol), is a 16-androstene class steroidal pheromone and neurosteroid in humans and other mammals, notably pigs.

[3] A stereoisomer of androstenol, 3β-androstenol (5α-androst-16-en-3β-ol), is also endogenous to humans (as well as to pigs), behaving as a pheromone and contributing to axillary odor.

[1] In addition, androstenol may be synthesized in the human nasal mucosa from androstenone, and likely also from androstadienol and androstadienone in this area.

[1] 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.

[1] In addition, androstenol has been found to decrease luteinizing hormone (LH) pulse frequency during the follicular phase of the human menstrual cycle.