Carbonated drinks can increase depression

The study included more than 900 participants, including both people with diagnosed depression and healthy volunteers. The analysis showed that with each additional glass of soda, the risk of depression increased by about 8%, and in women — by almost 16%.

The key role was played by the Eggerthella bacterium, the number of which increased in women who often drink sugary drinks. This microorganism reduces the level of butyrate, a substance that protects the intestinal mucosa and reduces inflammation. At the same time, it depletes tryptophan stores, which produce serotonin, a hormone of good mood.

Interestingly, an increased body mass index did not explain this relationship: even at the same weight, women who consumed soda were more likely to suffer from depression and had a less diverse microbiome.

It is emphasized that the effect of carbonated drinks on the psyche can be two—sided: sugary soda can increase the symptoms of depression, and depression itself can provoke cravings for sweets. However, even with this, the effect remains statistically significant.

According to the authors, the results of the study should be a reason for preventive measures and public awareness.:

“Educational campaigns and advertising restrictions are needed, especially among children. Carbonated drinks affect not only the body, but also the brain,” the findings say.

The researchers also recommend exploring the possibility of correcting the microbiome through nutrition, prebiotics, and probiotics as a way to prevent depression.