Which of the following represents the most active androgen among the listed options in typical physiology contexts?

• A. DHEA
• B. Androstenedione
• C. Epiandrosterone
• D. Testosterone

Answer: (D)

The most active androgen in typical physiology is testosterone because it directly binds the androgen receptor with high affinity and drives the main androgenic effects in tissues. It acts as the primary circulating androgen and can be converted in some tissues to dihydrotestosterone (DHT), which is even more potent, reinforcing its central role. The other substances are precursors or metabolites with much weaker intrinsic androgen receptor activity and mainly serve as reservoirs that can be converted to testosterone or DHT rather than delivering strong androgen signaling on their own.