
A new study from Germany has revealed a possible link between the consumption of carbonated drinks and an increased risk of developing depression, especially in women.
According to scientists at Frankfurt University Hospital, "opening a can" increases the level of Eggerthella bacteria, which are more often found in people with depression.
These bacteria, which affect the gut microbiome, can reduce the production of tryptophan – an important ingredient for the creation of serotonin, the mood-affecting hormone otherwise known as the 'happiness hormone'.
The study, published in the journal JAMA Psychiatry, analyzed 405 people with major depressive disorder and 527 without the diagnosis.
Participants reported their consumption of carbonated drinks and psychological symptoms, while stool samples were used to measure gut bacterial composition.
The results showed that women who regularly consumed carbonated drinks had higher levels of Eggerthella bacteria, while no such link was observed in men.
Researchers point out that sex hormones may play a role in this change.
Dr. Sharmily Edwin Thanaraja, co-author of the study, told Inside Precision Medicine that these findings “highlight the role of diet in the development of depression and point to the gut microbiome as a key mediator.”
Experts who were not involved in the research, such as Dr. Arun Swaminath of Lenox Hill Hospital, explain that the sugar in sodas can harm beneficial bacteria in the gut and increase inflammation, factors linked to mood disorders.
However, the authors warn that additional studies are needed to establish whether this is a cause-and-effect relationship.
Pending further results, doctors recommend limiting carbonated drinks and replacing them with water, as a safer way to maintain physical and mental health.
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