This paper seeks to describe Alzheimer's disease (AD) with deep concentration on causes and preventive strategies. In Canada, more than 747,000 people are living with Alzheimer’s or another type of dementia. (Alzheimer’s society, 2018).It is estimated that about 5.5 million Americans are suffering from Alzheimer's disease. In the next half-century, the figure is expected to increase by 8.2 million – be 13.8 million. This would be as a result of the growing generation of baby boomers. According to Alzheimer’s Association, 2015, after every 66 seconds, someone in the United States develops Alzheimer's dementia. This rate is expected to reduce by half – 33 seconds – by the year 2050. This would mean about 1 million cases of Alzheimer's dementia annually (Alzheimer's Association, 2016). The paper introduces the paper by explaining why the disease of great concern to not only the government but also the general Canadian and American Citizen. The condition is currently the sixth leading cause of death in the country. The paper discusses the causes of the Alzheimer’s condition. It explains how genetic, health, environmental, and lifestyle leads to the development of AD. The paper finally discusses the possible preventive strategies. It looks at both the non-pharmacological and the pharmacological approaches that can be used in the prevention of the condition.