Lifestyle for the BRAin Health - Nutrition and Exercise Training Intervention

This study is testing whether a combined program of healthy eating and exercise can protect and improve brain health in people who are showing early signs of memory decline (subjective or mild cognitive impairment) and have early markers of Alzheimer's disease in their system. **You may be eligible if...** - You are a non-smoker - You have noticed memory concerns or have been diagnosed with mild cognitive impairment - Your doctor has identified certain biological markers in your body associated with early Alzheimer's disease - You are able to commit to the program without major scheduling conflicts **You may NOT be eligible if...** - You have severe heart, liver, or kidney disease - You have poorly controlled diabetes (HbA1c above 7%), especially if treated with insulin or incretin analogs - You have had cancer treated with chemotherapy or radiation within the last 5 years - You have another serious illness that would interfere with participation Talk to your doctor to see if this trial is right for you.