There is no evidence that consuming sugar or aspartame can make a child with a normal attention span hyperactive. Although sugar does make energy available to the body, it does not increase excitement or activity.

Why does sugar make you energetic?

Your Mood. The occasional candy or cookie can give you a quick burst of energy (or “sugar high”) by raising your blood sugar levels fast. When your levels drop as your cells absorb the sugar, you may feel jittery and anxious (a.k.a. the dreaded “sugar crash”).

Why do I get hyper after eating sugar?

Refined sugars and carbohydrates enter the bloodstream quickly. Therefore, they cause rapid changes in blood sugar levels. This may make a child become more active. Several studies have shown a link between artificial colorings and hyperactivity.