What foods increase life expectancy ? do they have any negative effects ?

Magic foods: There is no magic elixir, but certainly fruits, vegetables, whole grain cereals will help. No negative effects from these foods.

Not known for sure: While not "foods, " the supplement resveratrol & herb astragalus may extend life. I would avoid foods known to accelerate aging- esp. Processed sugars & fried foods, & would avoid gmo foods, which have not been proven safe to eat.Having most of your calories coming from vegetables, fruits, nuts & seeds will likely help.Avoid animal-derived foods (including dairy & eggs) unless organic. See comment:.