6. Poor Memory: Poor concentration and memory loss can also be due to high sugar consumption. High doses of sugar lead to a rapid increase in your blood sugar level, which in turn prevents glucose from entering cells, including brain cells. Without glucose, the brain lacks the energy needed to function properly. This can cause trouble concentrating, remembering and making decisions.
A 2012 study published in the Journal of Physiology reports that a diet high in fructose affects learning and memory by slowing down the brain.
In addition, too much sugar can reduce proteins in the body that are necessary for memory and responsiveness. This can cause trouble remembering little things.