What is the function of HGH (human growth hormone)?

Human growth hormone (HGH) primarily functions to stimulate growth, cell reproduction, and regeneration in humans. It plays a vital role in promoting the growth of bones and muscles, which is essential during childhood and adolescence when the body is developing. In addition to its role in physical growth, HGH also enhances protein synthesis and affects the metabolism of fats and carbohydrates, ultimately leading to an increase in muscle mass and a decrease in body fat over time.

The correct choice highlights this fundamental role of HGH in encouraging not only body growth but also influencing metabolic processes, making it crucial for maintaining overall health and physical performance. This multi-faceted impact on growth and metabolism underscores why HGH is significant in developmental biology and athletic performance.