Sugary Drinks Linked to Increased Risk of Anxiety Disorders in Adolescents
Sugary drinks have long been recognised as one of the main causes of various physical health problems, from obesity to type 2 diabetes. However, recent scientific evidence suggests their impact may not be limited to the body, but may also extend to mental health, particularly among young people.
A study published in the Journal of Human Nutrition and Dietetics found a significant link between sugary drink consumption and an increased risk of anxiety disorders in adolescents. The research, reviewed by Healthline, reinforces the theory of a close connection between dietary patterns (nutrition) and a person’s psychological condition.
Researchers from Bournemouth University reported that adolescents who habitually consume high quantities of sugary drinks have around a 34% greater risk of experiencing anxiety symptoms compared with those who rarely consume them.
The findings were obtained through a systematic review and meta-analysis of nine separate studies. Of the total studies analysed, seven found a significant positive association between the consumption of sweetened drinks and increased anxiety symptoms in young people.
Nevertheless, the researchers offered an important caveat: these results demonstrate an association. In other words, the study does not constitute definitive proof that sugary drinks are the single direct cause of anxiety disorders.
Chloe Casey, one of the study’s authors and a nutrition lecturer at Bournemouth University, said that public health efforts have tended to focus on the physical effects of an unhealthy diet. “Although at this stage we cannot confirm the direct cause, this research has identified an unhealthy relationship between sugary drink consumption and anxiety disorders in young people,” said Casey.
She added that cases of anxiety disorders among adolescents have risen sharply in recent years. Identifying modifiable lifestyle habits is therefore crucial to curbing this trend.
Experts believe one possible cause relates to drastic fluctuations in blood sugar levels. Whitney Linsenmeyer, a nutrition expert and spokesperson for the Academy of Nutrition and Dietetics, explained that sugary drinks are a source of “empty calories”.
“Sugary drinks contain a lot of calories but almost no nutritional value. The sugar in these drinks is absorbed by the body very quickly, causing spikes and drops in blood sugar levels within a short period,” Linsenmeyer explained. This extreme fluctuation is suspected of contributing to emotional instability and other health problems.
Dana Hunnes, a senior dietitian at UCLA Health, added that what we consume can affect levels of important hormones. “Diet can influence hormones including serotonin and dopamine, which ultimately affect mental health,” she said.
The category of sugary drinks is not limited to fizzy drinks. Linsenmeyer reminded that many other types of beverages contain high levels of added sugar, including fruit drinks, energy drinks, sweetened teas and flavoured coffees.
By comparison, a 12-ounce can of fizzy drink contains around 39 grams of added sugar. Meanwhile, an energy drink of the same size can contain up to 41 grams of sugar.
Wesley McWhorter, a nutrition expert from the Academy of Nutrition and Dietetics, stressed that high sugar consumption is often part of an overall unhealthy lifestyle. Factors such as lack of sleep, poor diet quality and high stress levels are interconnected in influencing anxiety risk.
“A diet dominated by processed and high-sugar foods can worsen the body’s instability. Conversely, a balanced menu containing protein, fibre and healthy fats can help keep energy levels stable while supporting a better mood,” said McWhorter.
Experts suggest several practical steps towards healthier habits, including gradually reducing sugary drink consumption, replacing them with water or unsweetened alternatives, and adopting a more balanced diet overall.
Reducing sugary drink consumption is not only an investment in long-term physical health, but also an important preventive step for safeguarding adolescents’ mental resilience in the future.