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The Effects of Bad Gut Bacteria On The Body and What You Can Do About Them

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Updated on: June 8, 2021
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You may not know it yet, but there are bacteria in your gut. They exist in a symbiotic relationship with your body, like the trillions of other microbes in your gastrointestinal tract, calling your body their home.  

In a typical human gut environment, there is a balance of good and bad bacteria. Once this balance is disrupted, health problems begin to occur. 

Why is there Bacteria in the Gut?

Bacteria make up 90% of microorganisms found inside the human gut, introduced into the human body from birth to adulthood. 

There is a negative perception surrounding bacteria. People view them as bad because they cause diseases. While it’s true that there are harmful ones, there are also good bacteria in your gut - harmless microbes that help you stay healthy.

The bacteria in your gut help maintain good health by doing the following:

  • They aid in digestion
  • They break down toxins
  • They supply the gastrointestinal tract with energy
  • They protect the gut
  • They produce vitamins
  • They ‘train’ the immune system

We reviewed the top 5 microbiome test kits for testing your gut health. Read Now.


How to Know if You Have Bad Gut Bacteria

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Bacterial overgrowth causes an imbalance in the typical environment of the gut. When this happens, you’ll begin to notice tell-tale signs that you’d sometimes ignore, thinking they will pass. The most common ones include:

  • stomach disturbances like abdominal pain, bloating, gas, diarrhea, constipation, and heartburn
  • chronic fatigue
  • persistent sleepiness
  • poor concentration
  • skin issues
  • weight problems 

More severe conditions related to having too much bad gut bacteria include Crohn’s disease and Irritable Bowel Syndrome.

The Effects of Bad Gut Bacteria on the Body

The overwhelming presence of bad bacteria in the gut harms the various organ systems in the human body. A negative balance of bacteria in the gut directly affects our organs, body, and our overall health. 

On the Heart

A particular type of bacteria produces a chemical that the liver converts into trimethylamine-N-oxide or TMAO. TMAO causes the build-up of cholesterol in blood vessels which may lead to heart disease.

On the Kidneys

Aside from causing heart problems, the production of TMAO is also associated with the development of chronic kidney disease.

On the Liver

Having too much gut bacteria turns fiber into fatty acids. These fatty acids may be deposited into the liver, which may lead to the development of what is known as Metabolic Syndrome. When left untreated, metabolic syndrome can lead to obesity, heart disease, and Type 2 diabetes.

On the Central Nervous System

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The gut has many nerve endings that communicate directly with the brain, which doctors call the “gut-brain axis.” Having too much bad gut bacteria has been linked to autism, anxiety, and depression.

On the Digestive System

Poor gut health sets the stage for the development of several conditions related to the digestive tract. These conditions include Ulcerative Colitis, Crohn’s Disease, Colon Cancer, and Irritable Bowel Syndrome. These conditions often present with accompanying weight loss and abdominal pain. 

On the Immune System

An unhealthy gut significantly affects the immune system by increasing systemic inflammation. This causes a cascade of inflammatory events that may lead to autoimmune diseases such as type 1 diabetes.

On Mental Health

Gut inflammation and dysbiosis in the gut microbiota are associated with poor mental health. This is because of the gut brain axis. Anxiety and depression are just some of the mental health issues linked to poor gut health. 

How to Restore Good Gut Health

Because an unhealthy gut may lead to health problems, it’s essential to restore it to good health. But how does one do that, exactly? Here are several ways to improve not just your gut health but also your overall health and wellness. 

Avoid unnecessary use of Antibiotics

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Doctors prescribe antibiotics to treat bacterial infections. But as we all know, too much of anything is bad. Antibiotic overuse not only causes antibiotic resistance but may affect gut health, too. 

Research has shown that antibiotics can damage the gut microbiome. This is why it’s important to discuss options with your doctor before antibiotic use.

Diet

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The food that we eat passes through the gastrointestinal tract, and they directly affect gut health. To ensure a healthy gut, it’s important to eat healthily. This means making the right dietary choices.

Dietary factors play a lot when it comes to gut health. People with a plant based diet have shown a healthier gut microbiome compared to those who eat meat. 

On the one hand, a high in sugar and sweets diet causes an imbalance between the good and bad bacteria in the gut. A high fat, high sugar diet negatively affects the gut microbiome.

Health experts recommend avoiding certain foods like red meat, fried food, artificial sugar, fructose-rich food, alcohol, processed foods, and caffeine. 

Exercise

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Regular exercise helps control weight, prevent obesity, improve blood flow, and positively impact heart health. Research has shown that exercising improves gut health. 

Get good quality sleep

When it comes to sleep, the number of hours doesn’t matter much compared to the quality. So getting 8 hours of restless sleep won’t do any good. 

In a study conducted on animals, researchers found out that disturbed sleep negatively impacts gut health. On the one hand, good quality sleep has been linked to improvements in human gut health, cognition, and mood.

Manage Stress

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Did you ever notice how your digestive tract acts up when you’re feeling anxious? “Butterflies in the stomach” is often associated with stress, anxiety, and poor mental health.

Animal studies revealed that various stressors could negatively affect the balance of bacteria inside the gut and harm gut health. 

In humans, the stressors may come in the form of psychological and environmental stress, deprivation of sleep, and the disruption of the body’s internal clock. 

Proper stress management is essential for a healthy immune system and good overall health. Some stress management techniques include deep breathing exercises, meditation, and progressive muscle relaxation.

Prebiotics and Probiotics

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We have established the fact that there are millions of bacteria living inside the gut. To ensure gut health, it’s vital to maintain the balance of bacteria. We want the good ones to continue growing and the bad bacteria to stop multiplying. 

To do this, we feed the good bacteria in the gut with the food that they like - prebiotics; and we add living microbes directly into the gastrointestinal tract through probiotics. Thus, prebiotics and probiotics are essential to good gut health. 

Probiotics come in the form of food and oral supplements. This gives you more options for your sources of probiotics.

Best Food for Gut Bacteria

We are what we eat, they say - and this has been proven true with the knowledge that our gut health depends on what we feed the bacteria inside our gut microbiome. Certain foods are known to make the gut healthy.

Some of the most recommended foods to combat unhealthy gut and achieve a healthy gut are listed below. Dietary modification, no matter how small, will help you improve your gut health significantly.

Almonds

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Almonds contain 12.5 grams of fiber per 100 grams. They have high fiber content and possess prebiotic characteristics by promoting good bacterial growth while preventing bad bacteria.

Bananas

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Bananas provide the gut with a kind of fiber known as inulin. It promotes the growth of good bacteria.

Cheese

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There are many kinds of cheese, but not all of them are excellent sources of probiotics. The good ones for the bacteria in your gut are cottage, cheddar, mozzarella, and Gouda cheese.

Fermented foods 

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Fermented foods are made with yeast and bacteria. Examples of fermented foods include kefir, kimchi, kombucha, miso, natto, pickles, sauerkraut, tempeh, and yogurt, which are considered natural sources of probiotics and are thus beneficial for gut health. 

Garlic

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Garlic is an herb known for its taste and prebiotic properties. It helps ensure a healthy gut by promoting the growth of good bacteria while preventing bad bacteria from taking space inside the digestive tract.

Green Leafy Vegetables

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Green leafy vegetables contain a special kind of carbohydrates that supplies good bacteria with food. Plus, veggies are also high in fiber which helps with digestion.

Legumes

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Legumes have prebiotic properties that help restore an unhealthy gut to good health. Soybeans, baked beans, and red kidney beans are excellent examples. 

Polyphenols

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Polyphenols are compounds found in colorful food like green tea. They help maintain the balance of bacteria inside the gut as they fight off bad bacteria and encourage the growth of good bacteria in your gut. 

Additionally, they are good at easing the symptoms of peptic ulcers and inflammatory bowel disease. 

Good Gut Health for Overall Health and Wellness

Your overall health and wellness depend on various systems working together efficiently. Each of our organs is dependent on one another - if one fails, a chain of reactions happens.

As difficult as it is to understand, intestinal bacteria do not simply affect the digestive system alone.

More than bloating, gas, and chronic fatigue, patients are more prone to developing a slew of other diseases like irritable bowel syndrome, Crohn’s disease, type 1 diabetes, heart disease, and many more. 

A healthy gut contributes to a healthy you. So pay attention to what you eat - and what you don’t eat. A few healthy changes will go a long way.


The Ultimate Guide for a Healthy Gut. Read our 2021 Guide.

@ 2021 by Know Your DNA. All right reserved.
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