GuestJTT a very good point. I have been wondering just that myself. After all we trust that what we eat has been certified as edible and contaminant-free. I cook all our meals from scratch, btu of course I don't keep a cow for milk, and have to buy eggs, butter and cheese. We grow a lot of vegetables and salad stuff, but I still get many things from the supermarket. It's enough to make you paranoid!