The Brain's Rewiring: How Junk Food Affects Your Cravings and Weight Gain.

A study published in the journal Cell Metabolism suggests that eating fatty or sugary snacks alters our brain activity and creates lasting preferences for these less healthy items. The study showed that fatty, sugary snacks activate the brain’s dopamine system, which gives people a feeling of motivation or reward. The research is the first to demonstrate in humans that even small dietary changes can rewire brain circuits and increase the long-term risk of overeating or weight gain.