Cognition, Flavonoids, Exercise, Gut Microbiome

This trial is studying whether consuming flavonoid-rich foods (plant compounds found in berries, cocoa, and tea) combined with a 12-week exercise program can improve memory and gut health in older adults with mild cognitive decline. **You may be eligible if...** - You are 65–85 years old in good general health - You are a non-smoker - You show mild cognitive decline (MoCA score between 24.1 and 25.2) - You are currently physically inactive (exercising less than 150 minutes per week) - You are willing to be randomized to a dietary or exercise group **You may NOT be eligible if...** - You have a diagnosis of dementia or significant cognitive impairment - You are already physically active - You have a condition that prevents you from doing light to moderate exercise - You are currently taking medications or supplements that could interact with flavonoids Talk to your doctor to see if this trial is right for you.