There has yet to be any peer-reviewed studies or in-depth research that proves definitively or at least suggests that virgin coconut oil can help cure or manage dementia, as of 2015. In "Alzheimer's Disease: What If There Was a Cure? The Story of Ketones," Dr. Newport claimed that large doses of virgin coconut oil can help treat and prevent the onset of Alzheimer's disease. However, the evidence for the author's claims are anecdotal based on her own case study on her husband, according to Medical Xpress.
In theory, the medium-chain triglyceride content in coconut oil may stimulate the liver to produce more ketones, which are byproducts during the breakdown of fat. Ketones, in turn, will function as an alternative energy source for the brain, which can no longer use glucose when afflicted with Alzheimer's disease. Clinical evidence to support this theory, however, is still lacking, according to Science-Based Medicine.