“Sugar makes children hyperactive.”

The idea that a child's energetic behavior is directly caused by sugar consumption has been a widely held belief for generations, often leading parents to limit sweet treats in anticipation of a "sugar rush." This common misconception largely originated in the 1970s. During this time, a few initial studies, along with the influential 1973 book "Why Your Child Is Hyperactive" by Dr. Benjamin Feingold, suggested a link between food additives, including sugar, and excitable behavior in children. A single study from the mid-1970s, where a child's behavior reportedly improved after sugar was removed from their diet, also contributed to the myth's early spread.

However, subsequent scientific research has consistently failed to establish a direct causal connection. Numerous larger studies and comprehensive meta-analyses conducted since the 1990s have found no significant impact of sugar on children's behavior or cognitive function. For instance, a groundbreaking double-blind study published in the New England Journal of Medicine in 1994, where neither parents nor researchers knew if children received real sugar or a placebo, definitively debunked the "sugar rush" concept. These rigorous studies show that sugar is metabolized into glucose, which provides energy to the body, but this energy boost does not translate into hyperactivity.

The persistence of this myth can largely be attributed to psychological and contextual factors. Children often consume sugary foods in exciting, celebratory environments such as birthday parties, holidays, or social gatherings. The inherent excitement, novelty, and stimulation of these situations are far more likely to trigger energetic and boisterous behavior than the sugar itself. Furthermore, parental expectations play a significant role. Studies have shown that parents who anticipate hyperactivity after their child consumes sugar are more likely to perceive their child as hyperactive, even if the child was given a sugar-free placebo. This phenomenon, known as confirmation bias, reinforces the belief despite scientific evidence to the contrary.