IGF1 and liver disorder: Finally, we briefly describe how the GH/IGF-I axis is impacted by liver disease, weight loss, GH misuse for recreational and athletic performance-enhancing, GH-releasing hormone (GHRH) analog use in HIV lipodystrophy, and the alterations of the GH/IGF-I axis in subjects with congenital isolated GH and IGF-I deficiencies.