(1) Alzheimer's disease caused by the deposition of amyloid-Beta.
(2) Vascular dementia caused by the blockage of brain blood vessels.
(3) Dementia with Lewy Bodies by the deposition of lewy bodies.
But there is another type of dementia, which is Dementia caused by low blood sugar.
Our brain works mainly using sugar as a source of energy, so decreasing the supply of sugar to the brain causes a dramatic fall in cognitive recognition. As a result of that, symptoms of dementia like forgetfulness, difficulty to control emotion appear. The symptoms tend to appear before meals that are the time of low blood sugar.
This low blood sugar is caused by the abnormality of the hormone which controls blood sugar so that this type of dementia can be cured by elevating blood sugar by taking medication to elevate blood sugar.