Which got me thinking, you really shouldn't eat anything unless you know the basic story behind it. Like, mayo is a blend of oil and eggs, oil is pressed from olives and eggs are laid by a chicken. Miracle Whip is...????
Try it with your lunch today. I'm having sweet potato fries and spinach salad. Sweet potatoes grow from the ground and spinach does too! Feta is a cheese that is made from milk which comes from a cow. Raspberry vinaigrette is made from raspberry vinegar which is fermented from raspberry juice which is pressed from raspberries which grow on a bush.
I think you get the picture.
For bread and other products that you don't completely make at home, do the same thing for each ingredient. If you get to something you don't recognize, put the item down and find a version that all the ingredients are recognizable.