Alzheimer’s disease is a type of dementia caused by protein deposits within the brain that lead to a progressive decline in memory, thinking, and reasoning skills. It affects approximately 5.8 million people in the United States, according to the Center for Disease Control and Prevention. While most of the people who are diagnosed with Alzheimer’s are over 65, some younger people (under age 65) are also diagnosed with early-onset Alzheimer’s disease. Here’s a quick rundown about the symptoms, diagnosis and …