Doctor Explains How Sugar Triggers Dopamine Rushes and Addiction-Like Crashes

The notion of experiencing a 'sugar high'—a term popularized by pop culture and satirical shows like The Simpsons—has roots in real neurochemistry, according to gastroenterologist Santiago Gullino. When individuals consume ultra-processed ice cream or other sugary treats, their bodies undergo a rapid and dramatic dopamine surge. As Gullino explains, 'Ultra-processed ice cream isn’t just a treat; it’s a dopamine delivery technology designed to hack our biology.'

This dopamine spike, which can reach up to 200% above baseline, is not merely about pleasure but about the brain's reward and anticipation systems being hijacked. Fast-food desserts combine refined sugar and saturated fats, forming what experts call the 'Bliss Point.' Gullino notes, 'Ice cream combines refined sugar with saturated fats, creating what we in the industry call the ‘Bliss Point.’ This combination doesn’t exist in nature and triggers a synergistic response.' This synergy intensifies both the initial euphoria and the potential for developing tolerance, much like substance addiction

The aftermath of such indulgence is often less celebrated. After the initial rush, the body experiences a crash known as reactive hypoglycemia, which can mimic the hangover from alcohol or amphetamines. The pancreas responds to the sugar overload by releasing a large amount of insulin, leading to a sharp drop in blood glucose, irritability, and a stress response from the sympathetic nervous system. Gullino emphasizes, 'After that night of excess, Bart wakes up disoriented and with a hangover that rivals one from alcohol or amphetamines. In gastroenterology, this has a name: reactive hypoglycemia, but in the context of addiction, it’s the beginning of a cycle of dependence.'

This cycle of sugar-induced highs and lows sets the stage for cravings and withdrawal-like symptoms. The craving for another dose of sugar after a crash mirrors the compulsive behaviors seen with more traditionally addictive substances. 'It’s biologically similar to the urge the body feels for another ice cream cone or another sugary drink to get out of the crash,' Gullino adds. Over time, repeated exposure can desensitize dopamine receptors, necessitating ever-larger doses to achieve the same effect—a hallmark of addiction

The doctor also highlights the evolutionary context: our brains are hardwired to seek out sugar as a survival mechanism, making modern ultra-processed foods especially problematic. Dopamine is released both immediately upon tasting sugar and again after digestion, reinforcing the urge to repeat the behavior. Yet, as Gullino clarifies, 'Sugar intoxication has nothing to do with psychedelia. There’s no expansion of consciousness or genuine sensory alteration.' Instead, the 'high' manifests as excitability, impulsiveness, and eventual disinhibition, followed by a pronounced crash

From the OG Lab newsroom perspective, this scientific breakdown underscores why the global conversation around food addiction, dopamine, and ultra-processed foods is relevant to both public health and the evolving cannabis industry. As research into the gut-brain axis and neurochemical responses advances, parallels between sugar and other substances—both legal and regulated—will continue to shape policy and consumer awareness. For cannabis professionals, understanding these neurobiological pathways could inform future product development and harm reduction strategies