Whether sugar is addictive is currently under debate. What’s not debatable, though, is that sugar consumption has profound effects on the brain, especially in the release of the “reward” chemical dopamine. When people suddenly quit sugar, they often report “withdrawal” symptoms such as depression, brain fog, and anxiety—probably due to the sudden drop in dopamine levels in their brains.

Learn more here on the BBC about what sugar consumption—and stopping sugar—does to the brain.