Researchers today believe there is no single cause of Alzheimer's disease. Instead, they believe it is caused by a combination of factors, including family history, the external environment, and the internal environment. There is still much that we don't know about the disease, but researchers continue to look for causes.

Alzheimer's Disease and Risk Factors, from the Alzheimer's Society of Canada
Alzheimer's Disease and Risk Factors * What are risk factors? * How are risk factors determined? * What are the risk factors associated with Alzheimer's disease? * Reducing the r
Alzheimer's Disease Genetics Fact Sheet from NIA
Scientists don't yet fully understand what causes Alzheimer's disease (AD). However, the more they learn about AD, the more they realize that genes* play an important role in the development of this d
Alzheimer's Research on Causes and Risk Factors - An Overview
Topics: - What causes Alzheimer's - What is known about risk factors for Alzheimer's - Biological processes underlying the disease: What are the primary biological characteristics of Alzheimer's di
Alzheimer's Research on Causes and Risk Factors - Genetic Risk Factors
Genetic (Inherited) Factors Topics: - Are there genes that are known to cause Alzheimer's? - Do genes play a role in the most common form of Alzheimer's? - Does everyone who carries the APOE gen
Alzheimer's Research on Causes and Risk Factors - Non Genetic Risk Factors
Topics: - Age - Education level - Head trauma - Early life experiences - Dietary factors - High blood pressure and high cholesterol - Metals, such as aluminum and zinc Age During the cour
Brain Injury May More Than Double Dementia Risk
Brain Injury May More Than Double Dementia Risk in Older Veterans - Additional Study Suggests that Former Athletes with Concussions have Increased Risk of Cognitive Impairment, with Earlier Onset -
Causes of Alzheimer's Disease, from the Alzheimer's Society of Canada
Introduction At this time, we do not yet know what causes Alzheimer's disease or how to stop its progression. Researchers have discovered that Alzheimer's disease: * is not a part of norm