Human growth hormone (HGH) has been investigated for its potential role in supporting or treating injuries, particularly in muscle, tendon, and bone healing. HGH is known to stimulate cell growth, regeneration, and repair, which theoretically could enhance tissue recovery post-injury. Several animal studies and a limited number of human trials have shown that HGH administration can accelerate healing of musculoskeletal injuries such as fractures and tendon ruptures. For example, some studies have shown improved collagen synthesis and faster recovery times in animal models. In humans, small clinical trials have suggested modest benefits, including faster muscle strength recovery after surgery or injury.

However, the overall quality of evidence is low to moderate, with many studies being small, lacking rigorous controls, or involving athletes rather than the general population. There is insufficient large-scale, high-quality clinical trial data to definitively establish HGH as an effective treatment for injury recovery in most clinical contexts. Moreover, the use of HGH is associated with potential side effects, and its use outside of approved indications (such as growth hormone deficiency) is generally not recommended by medical authorities. Therefore, while there is some scientific rationale and preliminary evidence supporting its use, the evidence is not robust or widely endorsed.