1. Lack of focus. You’re likely familiar with the boost we feel after consuming something sugary, but this newfound alertness doesn’t last for long. On average, our glucose levels will drop after around 20 minutes, leaving us feeling unfocused and easily distracted.

Does eating sugar affect concentration?

Throughout the body, excess sugar is harmful. Even a single instance of elevated glucose in the bloodstream can be harmful to the brain, resulting in slowed cognitive function and deficits in memory and attention.

How does sugar affect studying?

Sugar has a long-term effect on learning. Because of the numerous effects sugar has on brain pathways and neurotransmitters, the scientists in the study concluded that sugar “over the long term alters your brain’s ability to learn and remember information.”