Foods that promote good health are produced from a respected organic grower, or grown yourself using organic methods. Most of our foods now come from organic farms that add antibiotics, hormones, herbicides/ pesticides and other harmful chemicals, and GMO corn/ soy with glyphosate from Monsanto's herbicide roundup. Three university studies determined that lab animals fed corn and/or soy with glyphosates developed cancers and sterility (and is probable that humans will do the same)
The big food companies do more harm to our foods by adding fillers, preservatives, food coloring, salt, sugar/ corn fructose and other less than healthful elements. Prices at the grocery also continue to increase while package sizes are decreasing. These foods no longer contain many of the basic nutrients we need. In a recent study at the Univ. of California, Davis, organic foods were found to have an average of 58 percent more polyphenolics (needed to promote good immune response). In brief, we are not getting what we expect at the gocery store(s).
My solution to the above is home-grown organic foods. The charity I direct, NPI, has posted a guide to organic home food production on its website (www.needfulprovision.org) ... see the 3rd topic on the upper left entitled "Healthy Foods Handbook." This handbook also includes tips on home preservation of foods and food safety ... and the information is free.