Change the bread you eat to Ezekiel Bread from Food For life. Most stores will have this bread in the freezer in the health food section. Or if you are in a health food store, in the freezer section as well. The three most popular types are the Sesame Seed (green), Genesis (blue) or Cinnamon Raisin (purple).
You can also get the Manna Bread in the same areas of the store. The Manna bread is not as common as the Ezekiel, but most full fledged health food stores have it.
You do not have to keep the bread in the freezer or even in the fridge when you buy it. It will last for a week or more on the counter in your house before it starts getting moldy. It will last a couple weeks in the refrigerator before it starts to get moldy.