Introduction: Traumatic brain injury (TBI) is a major public health problem and a leading cause of death and disability in the United States. Management of patients with TBI has changed very little over the last 20 years. Case Series: A case series of three patients with severe TBls who were aggressively treated with vitamin D3, progesterone, omega 3-fatty acids, and enteral glutamine for six weeks, termed neuroceutical augmentation for traumatic brain injury (NATBI), with very favorable outcomes. Conclusion: A large clinical study trial using these four supplements (NATBI) together is warranted.