One idea I have had is to do a "comparison" label which shows the ingredients for the handmade version of something, which could be put next to, say, the ingredient list for some heavily processed food. One prime example is bread. Here is what the comparison could look like:
Home Pride Wheat Bread:
Enriched Wheat Flour, Water, Sweetener (High Fructose Corn Syrup or Sugar), Yeast, Wheat Bran, Whole Wheat Flour, Wheat Gluten, Molasses. Contains 2% or Less of: Soybean Oil, Salt, Butter, Salt, Sweet Dairy Whey, Butter, Maltodextrin, Honey, Corn Syrup, Calcium Sulfate, Soy Flour, Dough Conditioners (May Contain: Dicalcium Phosphate, Calcium Dioxide, Sodium Stearoyl Lactylate, Ethoxylated Mono and Diglycerides, Mono and Diglycerides and/or Datem), Yeast Nutrients (May Contain: Ammonium Sulfate, Ammonium Chloride, Calcium Carbonate, Monocalcium Phosphate and/or Ammonium Phosphate), Cornstarch, Wheat Starch, Vinegar, Natural Flavor, Beta Carotene (Color), Enzymes, Calcium Propionate (to Retain Freshness), Soy Lecithin.
Homemade Wheat Bread (recipe from Cooks.com)
all purpose flour, dry yeast, milk, brown sugar, butter, salt, whole wheat flour
(Will the latter bread last a few years on the shelf? Probably not. But since it is much more delicious, it will be eaten more quickly!)