Parents have long been concerned about how sugary beverages affect their children’s physical health. From cavities to weight gain and type 2 diabetes, the risks of excess sugar are well documented. Now, new research suggests that sweetened drinks may also play a role in teen mental health, particularly anxiety.
A recent study from Bournemouth University in the United Kingdom has identified a significant association between high consumption of sugary drinks and increased anxiety symptoms in adolescents. While the findings do not prove that sugar directly causes anxiety, they add to growing evidence that diet may influence mental well-being.
In this article, we explore the research findings, what they mean for families, and how reducing sugary drink intake could support both physical and mental health in teenagers.
Researchers at Bournemouth University conducted a comprehensive review of studies published over the past 25 years. Their goal was to examine patterns between adolescent diet and mental health, with a focus on sweetened beverages.
The results were published in the Journal of Human Nutrition and Dietetics and included data from nine studies involving more than 73,000 young participants. Most of the research came from China and Canada, offering a broad international perspective.
The beverages analyzed in the review included:
Across the studies, researchers found a consistent pattern. Teenagers who consumed higher amounts of sugary drinks were more likely to report symptoms of anxiety.
One of the most striking findings came from a meta-analysis conducted as part of the review. The data showed that high sugar intake from beverages was associated with 34 percent higher odds of having an anxiety disorder.
Anxiety is already one of the most commonly reported mental health conditions among children and adolescents. With rates rising in recent years, identifying modifiable lifestyle factors has become a public health priority.
Chloe Casey, a lecturer in nutrition at Bournemouth University and co-author of the study, noted that public health efforts have historically focused on the physical consequences of poor dietary habits. Obesity and type 2 diabetes often receive attention, but the mental health implications of diet have not been explored as thoroughly.
She emphasized that many sugary drinks are energy dense but low in nutrients, which may contribute to both physical and psychological health challenges.
It is important to understand that this research shows an association, not a direct cause-and-effect relationship. In other words, the study does not prove that drinking sugary beverages causes anxiety.
There are several possible explanations for the link:
Because most of the studies reviewed were observational, researchers cannot definitively determine which factor comes first. However, the consistency of the findings across seven of the nine studies strengthens the case that there is a meaningful connection.
Although the study did not establish causation, there are biological mechanisms that may help explain the link between sugary drinks and anxiety.
High-sugar beverages can cause rapid spikes in blood glucose levels, followed by crashes. These fluctuations may contribute to mood swings, irritability, and feelings of nervousness.
For teenagers, whose brains are still developing, repeated blood sugar instability could potentially influence emotional regulation.
Diets high in added sugar have been linked to increased inflammation in the body. Some research suggests that inflammation may also affect brain function and mental health. Chronic low-grade inflammation has been associated with various mood disorders.
When teens consume large amounts of sugary drinks, they may displace healthier options such as water or milk. This can reduce intake of essential nutrients that support brain health, including B vitamins, magnesium, and omega-3 fatty acids.
Anxiety disorders among adolescents have increased significantly in recent years. Contributing factors may include academic pressure, social media exposure, global uncertainty, sleep disruption, and lifestyle changes.
Given this rise, researchers stress the importance of identifying habits that can be modified to help reduce risk. Reducing sugary drink intake is one potential strategy that is relatively simple and cost-effective.
Chloe Casey highlighted the urgency of addressing adolescent anxiety and pointed out that lifestyle habits are an important area for intervention.
For parents and caregivers concerned about teen anxiety and overall health, cutting back on sugary beverages can be a practical first step.
Here are some strategies:
Keep water easily accessible at home. Consider reusable water bottles for school and activities.
Energy drinks often contain both high sugar levels and caffeine, which can increase heart rate and feelings of jitteriness. Reducing or eliminating these beverages may benefit teens who experience anxiety symptoms.
Many fruit juices and flavored milk products contain added sugars. Checking labels can help families make more informed choices.
Teens are more likely to adopt healthy habits when they see adults doing the same. Reducing sugary drink consumption as a family can make the transition easier.
This research contributes to a growing body of evidence suggesting that nutrition plays a role in mental health. While no single food or beverage determines emotional well-being, overall dietary patterns matter.
Balanced meals that include whole grains, lean proteins, fruits, vegetables, and healthy fats provide nutrients essential for brain function. Combined with adequate sleep, physical activity, and stress management, healthy eating can support emotional resilience.
Further research will be needed to clarify whether reducing sugary beverage consumption directly lowers anxiety risk. However, given the well-established physical health benefits of limiting added sugars, this recommendation aligns with broader public health goals.
The link between sugary drinks and teen anxiety offers a new perspective on the importance of adolescent nutrition. While the study from Bournemouth University does not prove that sugar causes anxiety, it highlights a consistent association that deserves attention.
With anxiety disorders on the rise among young people, families and health professionals may want to consider dietary habits as part of a comprehensive approach to mental wellness. Reducing sugary beverage intake is a manageable step that may benefit both physical and mental health.
As research continues to explore the complex relationship between diet and mood, one thing remains clear: what teens drink could have more impact than previously thought.
Source: Bournemouth University news release, February 16, 2026; Journal of Human Nutrition and Dietetics, February 10, 2026.
Disclaimer: This article is for informational purposes only and is not intended as medical advice, diagnosis, or treatment. Statistical data reflects general trends and does not apply to individual circumstances. Always consult a qualified healthcare professional for personalized medical guidance regarding diet, mental health, or any medical condition.
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