If you needed another reason to manage your health, including blood sugar levels, researchers have found one. High blood sugar, even levels that are not yet approaching diabetes, has been linked to dementia. The most common form of dementia is Alzheimer's. More than 5 million Americans have been diagnosed with Alzheimer's. Researchers do not yet fully understand how the two are linked but the connection reminds us of the importance of incorporating good health habits in our everyday lives.