Understanding the Gut-Brain Axis and the Microbiome

Understanding the Gut-Brain Axis and the Microbiome

What You’ll Learn: In this blog, you'll discover the fascinating connection between your gut health and your mental well-being, known as the microbiota-gut-brain axis. We'll explore how this relationship impacts your mood and share practical tips on how probiotics and simple lifestyle changes can help support your mental wellness.  

In recent years, researchers have uncovered a fascinating connection between our gut health and mental well-being known as the microbiota-gut-brain axis. This term refers to the intricate communication network between the gut microbiome and the brain. Think of this as the G.I.’s ability to chat with our brains. Understanding the gut microbiome’s relationship with the brain may provide valuable insights into how our digestive health affects our mood and overall mental wellness. In this blog, we will explore the gut-brain connection, its impact on mood and how dietary supplements like probiotics can play a vital role in supporting our mood and well-being.

The Microbiome: A Brief Overview

The microbiome is a diverse community of microorganisms, including beneficial and non-beneficial microorganisms that reside in our bodies, particularly in the gut. These tiny organisms outnumber our human cells by a factor of ten, and play a crucial role in various bodily functions, including digestion, metabolism and immune response.1

A healthy microbiome is essential for maintaining balance in our bodies. Factors such as poor diet, stress, lack of sleep and even some medications may disrupt this delicate ecosystem, leading to an imbalance known as dysbiosis. Dysbiosis may have an influence over many various health issues, including digestive problems, increased waist circumference and even changes in mental well-being.

The Gut-Brain Axis: How Gut Health Affects Mental Well-Being

The gut and brain are connected through a complex network of signals that facilitate communication between the two. This connection involves various pathways, including the vagus nerve, the immune system and the production of neurotransmitters. Here are some key points about the gut-brain axis:

  • The Vagus Nerve: This long nerve runs from the brain to the abdomen and plays a crucial role in transmitting signals between the gut and brain. It helps regulate various bodily functions, including heart rate, digestion and mood.2
  • Neurotransmitter Production: The gut microbiome produces several neurotransmitters, including serotonin, dopamine and gamma-aminobutyric acid (GABA), which are essential for helping regulate mood and emotional well-being. In fact, about 90% of the body’s serotonin is produced in the gut.3
  • Immune System Interaction: The gut microbiome influences the immune system, which plays a crucial role in emotional health. Cytokine imbalance in the body may have a negative effect on mental function and mood, leading to a prevalence of occasional stress and feelings of being overwhelmed.4

The Impact of Gut Health on Mood

Research has shown that changes in the gut microbiome may contribute to mood fluctuations such as occasional stress and decreased positivity. For example, studies have found that individuals with persistent feelings of sadness, low energy and a loss of interest in daily activities often have altered gut microbiota compared to healthy individuals.5 Additionally, certain strains of probiotics have been shown to help lessen the effect of these symptoms of poor mood, highlighting the potential for gut health and its role in promoting mental well-being.

The Role of Probiotics

Probiotics are live microorganisms that, when consumed in adequate amounts, confer health benefits to the host. They may help restore balance to the gut microbiome, improve digestion and support immune function. Most importantly, probiotics may positively impact mental health by promoting a healthy gut-brain axis.

One dietary supplement that stands out in supporting gut health and emotional well-being is our Pure Encapsulations ProbioMood. This unique probiotic formula combines specific strains of beneficial bacteria with nutrients that support mood and emotional well-being. The blend includes Lactobacillus helveticus and Bifidobacterium longum, which have been shown to help lessen feelings of occasional stress and support a positive mood.6‡

ProbioMood also contains magnesium and vitamin B6, which are essential for neurotransmitter synthesis and overall brain health. By incorporating ProbioMood into your daily routine, you may help support a balanced mood and enhance your emotional well-being while also supporting a healthy gut microbiome.

Another supplement worth mentioning is our Epi-Integrity Powder, which is designed to support gut health and the integrity of the gut lining. This powder contains a blend of nutrients, including l-glutamine, which is known for its role in maintaining gut barrier function. This blend of nutrients has also been shown to help provide overall immune support.7 A healthy gut lining is crucial for limiting harmful substances from entering the bloodstream, which may impact both gut and brain health.

By promoting gut integrity, Epi-Integrity Powder can help create a favorable environment for beneficial gut bacteria to thrive, further supporting the gut-brain axis and overall emotional well-being.

Practical Tips for Supporting Your Gut-Brain Axis

In addition to incorporating dietary supplements like ProbioMood and Epi-Integrity Powder, there are several lifestyle factors that may support a healthy gut-brain connection:

  • Eat a Balanced Diet: A diet rich in whole foods, including fruits, vegetables, whole grains, lean proteins and healthy fats, can help nourish your gut microbiome. Foods high in fiber, such as legumes, nuts and seeds, promote the growth of beneficial bacteria because they offer prebiotics, or the food source for many beneficial bacteria in the gut.8
  • Stay Hydrated: Drinking enough water is essential for digestion and maintaining a healthy gut. Aim for at least eight 8-ounce glasses of water per day, or more if you're active.9
  • Manage Occasional Stress: Continual occasional stress may negatively impact gut health and mood. Incorporate stress-reducing practices into your daily routine, such as mindfulness meditation, yoga or deep breathing exercises.10
  • Get Regular Exercise: Physical activity has been shown to promote a healthy gut microbiome and support mood and emotional well-being. Aim for at least 150 minutes of moderate-intensity exercise each week.11
  • Prioritize Sleep: Quality sleep is vital for both gut health and mental well-being. Aim for 7-9 hours of sleep each night and establish a consistent sleep routine.12
  • Limit Processed Foods: Highly processed foods can negatively affect gut health and contribute to inflammation. Focus on whole, nutrient-dense foods to support your gut microbiome.13

Nourishing a Healthy Gut-Brain Connection

Understanding the gut-brain axis and the role of the microbiome in mental health is essential for promoting overall well-being. By prioritizing gut health through dietary choices, lifestyle changes and using targeted dietary supplements like Pure Encapsulations ProbioMood and Epi-Integrity Powder, you have the tools you need to support your mental wellness and cultivate a healthier lifestyle.

As always, it's important to consult with a healthcare professional before starting any new supplement regimen, especially if you have existing health conditions or are taking medications. By taking proactive steps toward better gut health, you can unlock the potential for improved mood and emotional resilience.


  1. Sender, R., et al. (2016). Revised estimates for the number of human and bacteria cells in the body. PLoS Biology, 14(8), e1002533.
  2. Mayer, E. A. et al. (2007). Gut/brain axis and the microbiota. The Journal of Clinical Gastroenterology, 41(5), 610-614.
  3. Yano, J. M., et al. (2015). Indigenous bacteria from the gut microbiota regulate host serotonin biosynthesis. Cell, 161(2), 264-276.
  4. Dantzer, R., O'Connor, J. C., & Freund, G. G. (2008). From inflammation to sickness and depression: when the immune system subjugates the brain. Nature Reviews Neuroscience, 9(1), 46-56.
  5. Naseribafrouei, A., et al. (2014). Gastrointestinal microbiota and mood: a review. Journal of Clinical Psychology, 70(9), 885-894.
  6. Messaoudi, M., Violle, N., & Bisson, J. F. (2011). Beneficial effects of probiotic supplementation on psychological well-being and cognitive function. Psychiatry Research, 190(1), 66-72.
  7. Robinson RR, et. al. J Am Coll Nutr. 2001 Aug;20(4):279-85.
  8. Slavin, J. (2013). Fiber and prebiotics: mechanisms and health benefits. Nutrients, 5(4), 1417-1435. doi:10.3390/nu5041417
  9. Popkin, B. M., et al. (2010). Water, hydration, and health. Nutrition Reviews, 68(8), 439-458. doi:10.1111/j.1753-4887.2010.00361.
  10. O'Connor, M. F., et al. (2010). The effects of stress on the gut-brain axis: implications for mood disorders. Neuropsychopharmacology, 35(1), 1-2. doi:10.1038/npp.2009.213
  11. Campbell, S. C., et al. (2018). The role of physical activity in the maintenance of gut health. Nature Reviews Gastroenterology & Hepatology, 15(9), 586-596. doi:10.1038/s41575-018-0039-5
  12. Walker, M. P., et al. (2006). Sleep, memory, and plasticity. Annual Review of Psychology, 57, 139-166. doi:10.1146/annurev.psych.57.102904.190448
  13. Monteiro, C. A., et al. (2018). Ultra-processed foods: what they are and how to identify them. Public Health Nutrition, 21(1), 1-5. doi:10.1017/S1368980017000234

 

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