Sift together flour, no-salt baking powder, no-salt baking soda, and no-salt substitute.
Beat unsalted butter until creamy. Add sugar gradually and beat until light and fluffy.
Add eggs and continue beating until well blended.
Add flour mixture alternately with bananas a small amount at a time, mixing after each addition only enough to moisten dry ingredients.
Turn into greater loaf pan. Bake at 350 degrees for about 1 hour and 10 minutes, or until done.