The same dopamine-driven reward circuitry that makes drugs addictive responds to hyperpalatable food. Research by Gearhardt found eating sugar-fat-salt combinations triggers dopamine release in the nucleus accumbens, creating pleasure and reinforcement. Over time, tolerance develops: you need more for the same reward. This explains why “just don’t eat it” fails when willpower confronts neural circuits designed for survival.
This companion covers the shared circuitry, how it works, and implications for change. (4 min read)