The Link Between Parasites and Mental Health: Understanding the Gut-Brain Connection

Between Parasites

Which types of parasites can cause mental health issues?

and Health

The ancient saying, “the heart and gut are connected”, has been substantiated in recent years with a growing body of evidence highlighting the link between the intestines and mental health. It’s now known that this connection, known as the gut-brain axis, isn’t only impacted by thoughts and emotions, but that parasites and other pathogens are also involved.

In this post, we’ll look at the connection between parasites and mental health, why it matters and what can be done to support the gut-brain axis.

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The Role of Parasites and Pathogens in Mental Health

As parasites and other pathogens are composed of bacteria and other microorganisms, they can “affect the instructions of genes, induce changes in the immune system, and activate certain proteins and pathways within the gut”. These changes may result in alterations in the “serotonin, dopamine, and other neurotransmitters within the brain” which are essential for mood regulation.

At the same time, pathogens can also elicit an immune response, one of the most concerning of these being inflammation. Not only does inflammation increase the body’s risk for chronic disease, but it can also alter cognitive functioning, leading to a host of mental health issues like anxiety and depression.

Identifying Parasites and Other Pathogens

If you’ve been experiencing mood swings, depression or anxiety, it’s important to identify any underlying parasites and other pathogens that may be contributing.

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The most common approaches for diagnosing parasites or other microbes include:

Stool Exam

The stool exam is a common procedure used to diagnose parasites. This test looks for evidence of microbial activity in the fecal matter.

Blood Test

A blood test can identify antibodies which show a reaction to parasites or other pathogens.

Imaging Studies

Imaging studies (such as an X-ray or MRI) may be used to identify any abnormalities in the gut or other organs.

Once any underlying pathogens have been identified, then treatment can begin.

Treating Parasites and Other Pathogens

When it comes to treating parasites and other pathogens, there are three approaches that can be used:


Antibiotics are often prescribed to treat bacterial infections, and can be used in combination with other treatments to combat parasites or other pathogens.

Natural Remedies

Natural remedies like herbs, essential oils and probiotics may be used to support the body’s natural microbial balance and boost the immune system.

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Food plays an important role in gut health. Eating a diet rich in fibre, vegetables, and beneficial fats can help to improve the balance of beneficial bacteria in the gastrointestinal tract.

Supporting Mental Health with Gut Health

By understanding the link between parasites and mental health and taking the necessary steps to identify and treat any underlying pathogenic issues, it’s possible to support both the gut-brain axis and overall mental health.

Whilst the ancient saying “the heart and gut are connected” is a useful reminder of the link between the two, the reality is that parasites and other pathogens can often play a role in mental health issues. As such, it’s important to seek professional help when needed, and take the necessary steps to identify, treat and support the microbiome in order to ensure optimal health.