Gary Brecka explains how sugar hijacks your brain's reward system by triggering both dopamine and opioid pathways at once. This dual hit causes your brain to dial down its receptors, forcing you to eat more sugar to feel the same effect, creating an addictive cycle.
Your brain has a reward circuit, a dopamine pathway that runs from your midbrain down into a region called the nucleus accumbens. This system evolved to reward survival behaviors: finding food, bonding with others, and staying safe. Every time you do something your brain classifies as good for survival, dopamine floods that circuit and you feel pleasure. The problem is that sugar just doesn't trigger dopamine. It also activates your brain's opioid system, the same system that makes morphine feel so good. Every time you eat something sweet, you're getting a 2-for-1 neurochemical hit. Dopamine. Dopamine for the wanting, opioids for the pleasure. And every time you get that hit, your brain does something that makes the whole thing worse. It downregulates its receptors. It dials back sensitivity to protect itself from overstimulation. So the next time you reach for sugar, you need more of it to feel the same relief.
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