The method of diagnosing and treating oxidative stress-impaired wound healing allows a practitioner to identify a subject at risk of having impaired wound healing by identifying the sensitivity of that patient to IGF-1. A finding of IGF-1 resistance, either systemically or at the site of an already existing wound, indicates an increased likelihood that the wound will have difficulty healing. In addition, identifying IGF-1 resistance by this method indicates that treatment of a wound with a combination of an antioxidant, IGF-1 and IGFBP-1 will provide optimal healing.