min read
June 20, 2024

Depression and Gut Bacteria: Are They Related?

The human gut microbiome is a fascinating and intricate ecosystem made up of trillions of microorganisms, mostly bacteria, that work in harmony to keep our bodies healthy and functioning.

These tiny microorganisms perform a myriad of vital functions, from aiding in digestion to supporting our immune systems. In fact, some scientists believe that our gut microbiome plays such a significant role in our overall health that it is often referred to as our "second brain."

But did you know that our individual microbiomes are like our very own "genetic footprints," unique to each and every one of us? The bacteria that make up our microbiomes can help determine our DNA, hereditary factors, disease susceptibility, body type, and much more. It's almost like a secret code that only our bodies know how to interpret. These tiny bacteria that exist within us can be found everywhere, from the food we eat to the air we breathe. And that's why scientists have been studying the relationship between our gut microbiome and other aspects of our health, including mental health.

Recent research out of Finland has identified a possible microbial culprit in mental health conditions such as depression. Yes, you read that correctly - a potential link between the bacteria in our gut and our mood! Imagine the possibilities that could arise from this discovery. New treatments for mood disorders could be just around the corner.

So, the next time you're feeling a little down, remember that there's an entire universe within your gut, and the bacteria that call it home might just hold the key to unlocking a happier, healthier you.

Gut Microbiome Linked to Depression

In the ever-expanding field of microbiome research, the potential link between gut bacteria and mental health is a topic of great interest. Recent findings suggest that there may indeed be a connection between the two, with certain mental health conditions being associated with distinct variations in gut microorganisms.

A review published in Physiological Medicine in May 2022 reported that individuals with major depressive disorder (MDD), bipolar disorder, or schizophrenia-spectrum disorders had higher levels of Streptococcus, Lactobacillus, and Eggerthella in their gut, but lower levels of Faecalibacterium - and that these variations were linked to more severe mental health symptoms. Factors such as medication use, diet, alcohol consumption, and smoking may all contribute to differences in gut composition.

This emerging field of research is shedding new light on the intricate relationship between the gut and the brain. Scientists are uncovering more and more evidence of bacterial imbalances in the gut of individuals with mood disorders and autism. While it remains unclear whether these microbial deficits contribute to the disorders, the findings have sparked a rush to harness gut microbes and the substances they produce as potential treatments for a range of brain disorders.

Ways to Improve Gut Health (and Mood!)

While many factors can impact the microbiome, including genetics and environmental exposures, certain lifestyle changes may promote gut health while also alleviating symptoms of depression and mood disorders.

  1. Eat More Organic Foods

An anti-inflammatory diet (one rich in fruits, vegetables, whole grains, and healthy fats, and low in animal products, processed packaged foods, and other foods linked to inflammation in the body) can help alleviate depressive symptoms.

  1. Exercise Regularly

Exercise is another key factor that can impact both gut health and mood. In addition to promoting healthy digestion, regular exercise causes your body to release feel-good hormones such as serotonin, making you feel better overall. Even moderate exercise, such as 30 minutes of walking per day, can have a positive impact on gut health and mental well-being.

  1. Take Probiotics or Fiber

Supplements and certain foods can also be used to promote gut health. Probiotics - the live "good" bacteria that flourish in your gut - can be added to the diet by consuming fermented foods like yogurt and kefir, or by taking a probiotic supplement. A review of research found that probiotic supplements may even help with depression, though the reasons for this are not yet fully understood. Fiber, a type of carbohydrate that feeds the good bacteria in the gut, can also be added to the diet through foods like whole grains, fruits, and vegetables.