According to Rosalynn Carter, the former First Lady of the United States, there are four types of people: "those who have been caregivers, those who are currently caregivers, those who will be caregivers, and those who will need caregivers." Carter, a long-time advocate for the rights of caregivers, understands the challenges they face. Aging is the greatest risk factor for developing Alzheimer's disease. As we live longer, our risk for this debilitating condition increases. However, there are proactive steps we can take to reduce the risk of dementia. Here are four proven ways to lower your risk of dementia: 1. Stay Active Exercise is crucial for brain health. It increases…