5α-Androstanediol, often referred to as 5α-androstane-3α,17β-diol, is a natural steroid hormone found in the human body. It is a metabolite of the more potent androgenic hormone dihydrotestosterone (DHT), which itself is derived from testosterone.

5α-Androstanediol is considered a weaker androgen compared to DHT, and it is present in both males and females, albeit in smaller quantities. While its specific functions are not fully understood, it is believed to play a role in influencing various aspects of human physiology, including sexual development and behavior.

Research into the exact roles and effects of 5α-androstanediol is ongoing, but it is part of the complex interplay of hormones in the endocrine system and is likely involved in maintaining hormonal balance and regulating certain physiological processes. Its significance and mechanisms of action are subjects of ongoing scientific investigation.