High dose vitamin C may be useful to to the body in many ways. Vitamin C is an antioxidant and will scavenge free radicals. At high doses, it can help balance oxidative stress seen situations of chronic illness, chronic fatigue, or recovering the body from an injury or surgery. It mught also helpful for post burn management or severe sun damage.
High dose vitamin C may play a role in the future as an anti-cancer treatment adjunct. It may also help reduce the symptoms of other cancer treatments such as chemotherapy and radiation therapy like fatigue, nausea and vomiting.