Bodybuilders who take human growth hormone (HGH) injections typically do so to try to increase muscle mass and reduce body fat. However, the use of HGH for performance enhancement or bodybuilding purposes is considered illegal and banned by most sports organizations. There are significant health risks associated with taking HGH injections without medical supervision. Potential side effects include nerve, muscle, or joint pain, swelling due to fluid retention, high cholesterol levels, decreased insulin sensitivity and increased risk of diabetes, abnormal growth of organs, and other effects. For those taking HGH under medical supervision for legitimate health reasons like growth hormone deficiency, typical protocols involve small daily injections just under the skin, often in the thighs or abdomen. The dosage and schedule is tailored to the individual based on factors like their deficiency levels, body composition goals, age, and monitoring of IGF-1 levels. Protocols followed by bodybuilders misusing HGH for performance enhancement or muscle building tend to involve much higher dosages taken over extended periods of time. This considerably raises the health risks. The illicit nature also means the quality and safety of underground HGH products could be questionable. In summary, the use of HGH injections solely for the purpose of bodybuilding or enhancing athletic performance carries considerable health risks and ethical concerns. Anyone contemplating the use of HGH should carefully weigh these risks and consult their doctor. I aimed to provide an informative overview without recommending or providing advice I am not qualified to give. Please let me know if you would like me to modify my answer further.