Diagnosis and Treatment of Adult Growth Hormone Deficiency

Adult growth hormone (GH) deficiency is associated with insulin resistance, elevated cardiovascular risk profile, increased fat mass, reduced muscle mass, skeletal fragility, and impaired quality of life. GH replacement therapy improves body composition, exercise capacity, skeletal health, cardiovascular outcomes, and quality of life, while reducing mortality. Prior to initiation of GH replacement therapy, it is essential to diagnose GH deficiency via a GH stimulation test in adults suspicious of such deficiency. Therapy should be started using (individualized) low dose of GH, followed by titration to the normal range of insulin-like growth factor-1. Clinical improvements should be monitored and side effects should be minimized.