it's a chemical reaction, really. through fat, sugar and salt, companies like kraft and frito lay have scientists that have found what they refer to as the bliss point: this is what happens when processed food hits same the pleasure center in your brain that clicks into overdrive when you're high.
the concept vanishing caloric density is especially frightening when applied to baked chee-tos, a favorite of fast food scientists. the chee-tos melted away before the brain could register it as having been consumed, so the hapless victim keeps eating it. no wonder i inhale those things when i eat them.
are things changing for the better? yes, they are -- but not fast enough. farmer's markets and the push towards organic whole foods is hardly enough. ultimately, it comes down to the individual breaking the cycle and choosing to not consume processed foods. that's not easy to do when you don't even know you're an addict in the first place.