Paleo Magazine: Depression -- In the First or Second Brain?

Today, it is estimated that one out of every five American adults suffers from a mental-health condition (43.7 million Americans--more than the combined populations of New York and Florida), and the statistuc only seems to be worsening. Additionally, from 2011 to 2014, rates of youth depression increased 8.5% to 11.1 percent; many youth are unable to access adequate treatment.

The medical establishment blames brain-based imbalances for this epidemic. But could it be due to gut dysfunction?