Summary: A recent analysis of more than 2,000 U.S. children suggests a link between daily consumption of caffeinated soda and a greater likelihood of alcohol sipping one year later. Researchers also found that daily soda drinkers showed higher impulsivity, weaker working memory, and distinct patterns of brain activity in regions involved in self-control and memory.
The study highlights neurobehavioral associations that could help explain why some children who frequently consume caffeinated soft drinks may be more prone to initiate substance use as they age.
Key Facts:
- Children who reported drinking caffeinated soda daily were about twice as likely to report sipping alcohol one year later.
- Frequent caffeinated soda consumption was associated with higher impulsivity and lower working memory—both recognized risk factors for later substance use disorders.
- Daily soda drinkers showed lower brain activation in regions tied to impulse control and working memory during cognitive tasks.
Source: Taylor and Francis Group
Frequent caffeinated soda intake in younger children may predict future alcohol experimentation, a new study finds.
Using data from the large, ongoing Adolescent Brain Cognitive Development (ABCD) Study, researchers examined drinking habits, cognitive performance, and brain activity in more than 2,000 U.S. children aged nine to ten. Children who reported consuming caffeinated soda daily were roughly twice as likely, one year later, to say they had sipped alcohol compared with children who did not drink caffeinated soda daily.
Published in the peer-reviewed journal Substance Use & Misuse, the study controlled for a number of potential confounding factors, including family history of drug use and parental education. Even after accounting for these influences, daily caffeinated soda consumption remained associated with both behavioral and neural markers linked to substance use risk.
To better understand cognitive differences, participants completed tasks measuring impulsivity and working memory while researchers recorded brain activity. For example, one working memory task required children to judge whether a current object matched the objects shown in the two immediately preceding trials. During an impulse-control task, neural activation patterns were assessed to identify differences between daily soda drinkers and their peers.
Children who frequently consumed caffeinated soda scored higher on impulsivity measures and performed worse on working memory tasks. Those behavioral differences were mirrored by reduced activation in key brain regions: lower activity in the anterior cingulate cortex (ACC) during impulse-control tasks and reduced activation in the inferior frontal gyrus (IFG) during working memory tasks. Reduced ACC activation is commonly observed in attention-deficit hyperactivity disorder (ADHD) and in people with substance use disorders, while diminished frontal cortex activation has been linked to poorer working memory capacity.
The authors emphasize that the findings demonstrate association rather than causation. Lead author Mina Kwon of Seoul National University suggested one possible explanation: “The substances contained in caffeinated soda (caffeine and sugar) could induce a toxicological effect on the brain, making the individual more sensitive to the reinforcing effects of harder drugs like alcohol.” This reflects the so-called “gateway hypothesis.”
An alternative explanation is the “common liability hypothesis,” which proposes that children with pre-existing traits—such as weaker impulse control—are more likely to try stimulating substances like caffeinated soda early on and later progress to alcohol or other substances as access increases. Professor Woo-Young Ahn, Director of the Computational Clinical Science Laboratory at Seoul National University, notes: “Frequently consuming caffeinated soda could indicate a higher risk of initiating substance use in the future, due to the common risk factors between the two behaviours.”
The researchers call attention to public health implications: there is limited consensus on a safe caffeine dose for children, and some youngsters may be particularly vulnerable to adverse effects of regular caffeine and sugar intake. They recommend developing evidence-based guidance for caffeinated soda consumption in minors and highlight the need for additional longitudinal research to determine whether early caffeinated soda use predicts later use of alcohol or other, harder substances.
The study does have limitations. A substantial number of cases contained missing data and were excluded from analyses, which could bias results if the missing cases were not random. The authors also acknowledge that multiple unmeasured factors may mediate the observed relationships between soda intake, neurobehavioral risk factors, and subsequent alcohol use despite statistical adjustments for known confounders.
About this alcohol use disorder and neurodevelopment research news
Author: Simon Wesson
Source: Taylor and Francis Group
Contact: Simon Wesson – Taylor and Francis Group
Image: The image is credited to Neuroscience News
Original Research: The findings will appear in Substance Use and Misuse