Androstenedione is a steroid hormone produced mainly in the adrenal glands and gonads. It serves as a precursor to both testosterone and estrogen, playing a crucial role in the body's hormone production. Levels of androstenedione can vary based on age, sex, and overall health. In addition to its natural production, androstenedione is sometimes used as a dietary supplement, particularly among athletes and bodybuilders, to enhance performance and muscle growth. However, its use is controversial and may be banned in competitive sports due to potential side effects and health risks.