3-beta-hydroxyetioallocholan-17-one, also known as 17-hydroxy-DHEA (dehydroepiandrosterone), is a steroid hormone that plays a role in the biosynthesis of androgens and estrogens. It is derived from cholesterol and is primarily produced in the adrenal glands, gonads, and brain. This compound is involved in various physiological processes, including metabolism, immune response, and aging. Research has also explored its potential effects on mood, cognition, and overall health.