Thank you for the opportunity to help you with your question!
When cutting sugar intake in your diet, your body would be required to adjust and get used to low influx of sugar. Although your body carries all sugar balancing activities without necessarily needing a dose from external environment, you will experience a huge urge to take in sugar.
Mild-irritations, headaches and general weakness (withdrawal)
If you cut all sugar filled snacks from your diet in preference for sugar free cereals, you may experience weaknesses, irritation and headaches in the first few days. This is usually due to mild dehydration caused by the diuretic effect of a lower-crab diet that is both low in sugars and refined carbs from flours.
Please let me know if you need any clarification. I'm always happy to answer your questions.