What Happens When You Stop Eating Sugar For 30 Days? 5 Changes You May NoticeGiving up sugar for 30 days can trigger surprising changes in your body. But what happens when you stop eating added sugar for 30 days? The results may vary depending on your lifestyle, diet and overall health, but many people notice improvements in energy, cravings and food choices. First Few Days: The Sugar Withdrawal PhaseThe initial days of quitting sugar can be difficult.