I can't say enough about how much there is to learn from Dr. Zach Bush. This talk was posted by AutismOneMedia; in it you learn more about his background, how he had to leave academia but nonetheless found his true "practicing doctor's" roots again in a tiny town in Virginia. This down-home experience was what opened the door to his incredible new trajectory of discoveries in why human health is failing so terribly.
Here's the summary, as posted on this YouTube: Dr. Bush explains the unifying science behind devastating changes in the food, farming, and medical industries, introducing the breakthrough science of bacteria and their communication with the body's defense systems. The industrial storm of the last 70 years has left the human gut and immune systems vulnerable to injury. Two synergistic toxins in our food and water systems have exploited this vulnerability, resulting in direct damage to the tight junctions that compose the natural firewalls at the gut/blood and blood/brain barriers. The correlations between diet, gut bacteria, and autism have been long-recognized. ... The [new] science of bacterial communication is the foundation for a new class of dietary supplements that go beyond what has been available.