"processed food" has a very specific meaning. Basically, anything that comes in a factory sealed bag or wrapper. So, not a burrito from Chipotle, but a cliff bar or a twinkie or anything that has a long and confusing ingredients list.
"Food science" has advanced to the point where companies explicitly try to hack tastebuds and desire receptors (dorritos optimizing for salty+sweet to induce more hunger while you eat) thereby increasing desire for their product and, they hope, reducing self-action of restraint towards their product.
"Food science" has advanced to the point where companies explicitly try to hack tastebuds and desire receptors (dorritos optimizing for salty+sweet to induce more hunger while you eat) thereby increasing desire for their product and, they hope, reducing self-action of restraint towards their product.