At present, there are no therapeutic agents that can minimize severe hypoglycemia (low blood sugar) and its effects on long-term brain function. The aim of this study is to determine whether the human brain is able to use medium chain fatty acids (MCFA) and/or their metabolites as an alternative fuel source during acute hypoglycemia in patients with Type 1 Diabetes Mellitus (T1DM). The hypothesis is that medium chain fatty acids will provide a rapidly absorbed, non-carbohydrate fuel that will improve cognitive performance during episodes of hypoglycemia (low blood sugar.)