Androstenediol (androst-5-ene-3β,17β-diol) is a naturally occurring steroid hormone precursor produced in the adrenal glands and gonads, playing a key role in the biosynthesis of important hormones such as testosterone and estrogen. It gained scientific attention in the mid-20th century during early research on steroid pathways and endocrine function, where it was identified as an intermediate in androgen and estrogen metabolism. Over time, its biological significance expanded into areas like immunology and hormone regulation. In the 1990s and early 2000s, androstenediol became widely known as a dietary supplement promoted for muscle growth and performance enhancement, which led to regulatory restrictions and bans by sports authorities due to its potential performance-enhancing effects. Today, it is primarily studied in pharmaceutical and clinical research for its role in hormone metabolism and endocrine system function.
