When we think about improving our brain health, we often think about mind-stimulating activities like crossword puzzles, Sudoku or Wordle. But there’s a lot more to a sharp mind than brain games: Day-to-day habits play a big role in brain health, too, starting with your diet. “Soda is one of the worst foods for brain health due to the high concentration of simple sugars, which damage the blood vessels supplying the brain,” he said. French friesHere’s another bummer: French fries are one of the main foods neurologist Dr. Pedram Navab avoids. So remember to consume any favorite foods and beverages that may damage brain health in moderation, and when possible, opt for a healthier version of it.