Serostim is a synthetic human growth hormone used to treat conditions affecting growth and metabolism such as adult growth hormone deficiency, cachexia associated with HIV/AIDS, and short bowel syndrome. It stimulates cell growth which can improve muscle mass, bone density, energy levels, wound healing, and reduce inflammation. Side effects can include headache, nausea, joint pain, and serious side effects like increased brain pressure or diabetes. Serostim is an effective treatment but should be used under healthcare supervision to minimize risks.