Research reveals that the brain is a target organ for damage by high blood sugar.

Sugar activates the brain's reward system that releases feel-good hormones. Too much sugar too frequently will hijack this reward system and will cause a loss of control, cravings and increased tolerance to sugar.

When you eat too much sugar, your blood sugar levels peak and drop. This causes you to experience irritability, mood swings, brain fog, and fatigue. You may find yourself feeling anxious or depressed. Carb-laden foods create the same response.