The fast, sugary foods making us fat and sick are perfectly engineered to trigger biological responses that are incredibly hard to resist. High-sugar foods release a massive hit of dopamine. Dopamine is a chemical reward for the brain, and as the pleasure monkeys we are, we are wired to seek it. Whether you want to call it an addiction or not, when you figure out how to release dopamine into your brain, you are going to have a hard time stopping. The same is true for sugar.
