“Sugar is more addictive than cocaine.”

The idea that sugar is more addictive than cocaine often originates from compelling animal studies, particularly a notable 2007 paper where rats, given a choice, frequently preferred intensely sweetened water over intravenous cocaine. These findings, demonstrating that intense sweetness could surpass the reward of cocaine in rodents, were then widely interpreted and popularized, suggesting a similar or even stronger addictive potential for sugar in humans. Some scientific reviews have also highlighted similarities in how both sugar and cocaine activate the brain's reward system, contributing to the perception of comparable addictive qualities.

However, the scientific community largely agrees that these animal research outcomes do not directly translate to human addiction. While sugar certainly stimulates the brain's reward pathways and can lead to cravings, the complex physiological and psychological criteria for addiction in humans, as seen with substances like cocaine, are not met by sugar. Cocaine and other addictive drugs cause distinct changes in brain cells and neural ensembles that sugar, even in high amounts, does not produce to the same extent, leading to significantly different addictive potencies and withdrawal experiences.

People often embrace this misconception because the experience of strong cravings and difficulty in moderating sugary food intake can feel very powerful and consuming. The palatable nature of sugar, especially in highly processed foods, triggers a robust reward signal in the brain, which can indeed challenge self-control. This sensation of being "hooked" on sweet treats, coupled with the dramatic comparison to a notoriously addictive drug like cocaine, makes the myth resonate and seem plausible to many individuals struggling with their dietary habits.