Alzheimer’s disease is a progressive neurological degenerative disease. It results in a slow, irreversible death of brain cells, causing irreparable loss of memory and cognitive skills. Damage usually begins in the hippocampus, the part of the brain responsible for memory. The degeneration spreads to the rest of the brain causing shrinkage of the brain tissue. Early onset Alzheimer’s disease affects patients between the ages of 30 and 60 years. Late onset Alzheimer’s disease occurs in patients above 60. Alzheimer’s disease can progress into dementia.