What are prohormones?

Prohormones refer specifically to compounds that serve as precursors to hormones, meaning they are transformed by the body into active hormones. In this context, prohormones are produced within various glands in the body and undergo enzymatic processes that convert them into hormones. This is important for regulating various physiological functions, including metabolism, growth, and tissue repair.

Unlike anabolic steroids, which are active forms of hormones and can directly influence muscle growth and performance, prohormones require biochemical conversion to exert their effects. This distinction highlights the role of prohormones in the hormonal synthesis pathway rather than their direct action as steroids.

While the other options describe unrelated substances or concepts—such as natural steroids or stimulants—only the option mentioning an intraglandular precursor accurately captures the definition and function of prohormones within the endocrine system.