Sugar activates your body’s reward system by releasing the feel-good hormones dopamine and serotonin in the brain, according to Robert Glatter, M.D., an assistant professor of emergency medicine at Lenox Hill Hospital, Northwell Health.
To put it another way, the more sugar you eat, the better you feel – at least for a while. However, when you stop eating sugar completely, your body goes through withdrawal, which is unpleasant for both your body and your brain.
“Once you limit your sugar intake, your brain responds, and you may feel unpleasant or irritated, particularly during the first few days,” Glatter explained.
He said that many people experience tiredness, headaches, or even a sense of sadness or depression, which are all signs that your body is adjusting to the low amounts of glucose, dopamine, and serotonin. “Your stamina will start to improve within a week or so, and then you will feel more lively and less irritable.”
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