Salmon. Eating two 4-ounce servings of wild salmon a week makes you 42% less likely to suffer hearing loss. That’s according to a large-scale study in the American Journal of Clinical Nutrition. If you can’t get wild salmon, tuna and mackerel will do the trick too. Why does it work? Because the omega-3 fatty acid in these fish improves blood flow to the inner ear. Those fatty acids guard your eyes too, by protecting the cells that deteriorate with aging.