When you consume coconut oil, your body makes an alternative fuel for your brain called ketone bodies or simply ketones. Ketones are what your body creates when it converts fat into energy.
A chief source of ketones are the medium chain triglycerides (MCT) generously found in coconut oil. Unlike long chain triglycerides (LCT) which entirely comprise other dietary oils, MCT-rich coconut oil goes directly to your liver, which quickly transforms the oil into ketones.
When carbohydrates are so insufficient that energy must be taken from breaking down fatty acids, brain cells that have access to ketones swiftly obtained by digesting coconut oil could potentially stay alive and continue to function, thus preventing tumor development.