You will experience withdrawal
We eat sugar because it makes us feel good, and after awhile, the brain knows to trigger a sugar craving when it wants a hit of happiness. Eating sugar also provides a swift, if temporary, rush of energy.
When you quit eating sugar, the brain will continue to clamor for it for some time. Resisting the craving can be uncomfortable, and may lead to a phase of depression. Some people also report fatigue, irritability, headaches, cramps, or bloating. But hang on! This part lasts just a few days before symptoms ease.