Alzheimer’s disease (AD), the most common type of senile dementia, is an age related progressive neurodegenerative disease that affects more than 20 % people over the age of 80. It is predicted that over 35 million people will have AD by the year 2050 world-wide¹. Neurodegenerative disorders in AD patients leads to progressive cognitive dysfunctions that includes language, memory, judgement, decision-making and orientation to physical surroundings^2,3. It has been estimated that 5% of the population older than 65 years is affected by Alzheimer’s disease^4,5 .The prevalence doubles approximately every 5 years beyond age 656 and some studies suggest that nearly half of the people aged 85 years and older suffer from this devastating disorder^1,7.