Useless Fruits and Vacant Veggies

They have far fewer nutrients than they did a few decades ago, but experts still urge people to keep eating what amounts to produce-shaped cardboard.  You want people to have a healthy diet?  Send them to a farmer's market for heirloom crops, preferably grown with organic or biodynamic methods that nourish the soil.  If you grow your own, prefer heirloom varieties to modern hybrids.  Another option is wildcrafting: anything growing on its own hasn't been bred stupid, although you may still have to contend with soil depletion.