Your Zip Code Shouldn’t Determine Your Life Expectancy–But It Certainly Influences It - s11 ep07 AI Episode Summary Devin Thorpe interviews John Matthew Douglas, co-founder of Nello Health and I Press Forward LLC, on the Superpowers for Good show. John Matthew Douglas is an authority on social determinants of health and explains that social determinants of health are about the environment we live in and the barriers that may hinder our health and well-being.