Here's where it gets interesting. Your brain runs on glucose—blood sugar. When you make decisions, you burn glucose. When glucose runs low, decision quality plummets.
In studies, people given a sugary drink between decision-making tasks performed better than those given an artificially sweetened drink. The sugar literally refueled their decision-making ability.
But before you stock up on candy bars, understand this: the sugar boost is temporary and comes with a crash. It's like using credit cards to pay bills—a short-term fix that creates bigger problems.
The real solution isn't more fuel; it's burning less. That's what the rest of this book teaches.