You know the principle behind this post. Perhaps you have had a shoe experience with this principle. You saw a cute pair of shoes in the window at a no-name outlet.
"What??! Only $15 for these shoes? They are soOOO cuYUTE! I'm getting them. They are a steal." You took them home, busted them out of the box, brought them to your favorite dance spot down town, and in an hour the heel broke. "Cheap pieces of crap."
Cheap food is like that, only the realization of true value isn't realized until YEARS down the road. We're not living in dog years, we're living in human years, and as a result things are much slower. It's hard to connect the cost of diabetes and obesity to the cheap fast food you ate for lunch because it was too time consuming and expensive to prepare and bring a quality salad with you to work.
So when you're saving money on cheap food, make sure you calculate possible future medical bills into the equation. Like a really smart kid once said, You can either pay the farmer, or the doctor.