Introduction
Few advances have been made in overall survival for glioblastoma multiforme (GBM)Few advances have been made in overall survival for glioblastoma multiforme (GBM)in more than 40 years. Here, we report the case of a 38-year-old man who presentedwith chronic headache, nausea, and vomiting accompanied by left partial motor seizuresand upper left limb weakness. Enhanced brain magnetic resonance imagingrevealed a solid cystic lesion in the right partial space suggesting GBM. Serum testingrevealed vitamin D deficiency and elevated levels of insulin and triglycerides. Prior tosubtotal tumor resection and standard of care (SOC), the patient conducted a 72-hwater-only fast. Following the fast, the patient initiated a vitamin/mineral-supplementedketogenic diet (KD) for 21 days that delivered 900 kcal/day.