The Link between Gut Health, Fatigue & Energy

The Link between Gut Health, Fatigue & Energy

by Jef L’Ecuyer, Registered Dietitian

Feeling tired or low in energy is common and something that all of us have felt the impact of. It’s easy to understand why you’re feeling tired when you’ve missed out on sleep, if you’re stressed out, or your eating habits are not giving you the fuel you need, but the truth is ongoing fatigue is usually part of a much more complex issue. In the short term, easy and obvious fixes like caffeine and sugar may seem to help make things better. But, in order to truly feel more energized, it’s important to understand the root of the issue and look at which systems in the body may be out of balance. 


The Digestive System & Energy

Like so many other areas of our health, the gut has a huge impact on our overall wellbeing. This probably isn’t too surprising given that we know food = energy, and food is processed through the digestive system. Yet, there is more to the story! Unfortunately, when the gut microbiome is compromised, several issues that are directly linked to energy and fatigue may arise.


Decreased Nutrient Absorption

We’ve been told our whole lives “you are what you eat” and while this is certainly true, and the food is our fuel, the food still needs to be absorbed and assimilated in order to power our bodies properly. A healthy gut microbiome with a healthy balance of good bacteria plays several roles in the energy equation. At the most basic level, if our gut health is compromised, it may lead to the inability to break down food properly. Thus, when the nutrients aren’t available for cellular energy production, you certainly won’t be feeling energized!

On top of this, a healthy microbiome plays other roles in the metabolic-energy equation. Healthy bacteria in the gut help to create some of their own B-Vitamins which have specific roles in energy production. Healthy bacteria also communicate with the other cells in the body to help regulate blood sugar and thus, help to avoid fluctuating energy levels. What’s more, is that the healthy bacteria in the gut microbiome also help to create and regulate neurotransmitters (like serotonin and tryptophan), the chemicals in the brain and the body responsible for happiness, motivation, and sleep - all the things directly tied to feeling energized!

Given that we must support our gut microbiome for nutrient absorption for optimal energy, it’s imperative to ensure we’re getting enough gut supportive nutrients as well as natural probiotics within our diet! Fermented foods such as sauerkraut, kimchi, tempeh, kvass, natto, and pickles can be extremely helpful in helping to ensure healthy populations of good bacteria in the gut. It’s also helpful to consider taking a high-quality probiotic created with clinically-proven bacterial strains that is also research proven to be effective in humans. Supplementing with a probiotic is especially important during times of high stress, poor diet or when taking medications or antibiotics.


Chronic Inflammation

High levels of inflammation in the body are also related to fatigue through dysbiosis, (the result of a bacterial imbalance) which often results in a digestive condition known as “Leaky Gut”.

With “Leaky Gut”, the integrity of the intestinal lining is compromised which leads to unwanted toxins and undigested food particles entering the bloodstream. This sets alarm bells off in the immune system including the release of inflammatory molecules known as ‘cytokines’.  The syndrome presents different symptoms in different people, yet fatigue and brain fog are very common.

The good news is that reversing dysbiosis and working towards healing the integrity of the gut lining are entirely possible. Although the protocol is unique for every individual, it generally includes: reducing inflammatory foods (or those foods which may cause sensitivities such as processed food, sugar, gluten, lectins, conventional dairy, GMOs & FODMAPs), adding in healing nutrients from food such as bone broth, colorful plants, healthy fats and taking supplements (Vitamin D, Omega 3, Zinc, and L-Glutamine). The reinoculation of the beneficial bacteria (from food and a high quality probiotic) is also a priority in order to form a healthy line of defense against unwanted invaders, which ultimately keeps inflammation in check.


Disrupted Immunity

Another example of how the gut impacts energy and fatigue levels is its role in immunity. With over 80% of the immune system being housed in the intestine, a healthy gut will lead to a healthy immune response. While we all know that when we’re faced with an illness we aren’t our most energetic or vibrant selves, there’s more to it than that.

A healthy intestinal lining is one where the vast and diverse bacteria create a film like a barrier along the inside wall. When the balance of good:bad bacteria is in a healthy ratio, the gut lining is protected and the good bacteria will crowd out the disease-causing bad bacteria, helping to fight infections.

When considering the health of the immune system living inside your gut, many of the same simple ideas apply: eat healthy fruits, veggies and fermented foods in order to feed the good bacteria, take an effective multi-strain probiotic daily to replenish the bacteria in the gut microbiome, avoid over-sanitization and practice good stress management and sleep habits!


Do you have any other questions about gut health? Ask us in comments below. If you are looking to stock up on Bio-K+, head to our store locator. For more information on Bio-K+, probiotics and digestive health, contact us, find us on Facebook and Instagram or join our community


Jef L’Ecuyer
About the author
Jef L’Ecuyer, Registered Dietitian
After her nutrition training at McGill University, Jef specialized in gastrointestinal health with a special interest in the microbiota and Irritable Bowel Syndrome. With Bio-K+, she continues on this path by making the world of probiotics more accessible to all.
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