Gut Parasites: Signs of a Parasitic Infection and How to Restore Your Gut Health
Let's talk about a subject even I avoided for a long time: parasites. It's something a lot of us would rather skip over, but if you're anything like me, gut parasites get a whole lot easier to talk about once you have the right information and a clear plan for supporting your body. So let's get into it.
If you're like our clients, you've probably stumbled across the idea of a parasitic infection while searching for answers to symptoms that just don't add up. You've been told your labs are normal, your doctor says everything looks fine, but your digestive issues won't budge, your energy is in the low, and something still feels deeply off. That something could be intestinal parasites and you'd be far from alone.
Studies suggest that up to 40% of people carry some form of gut parasites without knowing it.In this guide we're going to walk through everything: the common symptoms of parasites, how you actually get intestinal parasites, how to test for them properly, and what your real treatment options look like.
What Are Gut Parasites? Understanding a Parasitic Infection
A gut parasite is an organism living inside your digestive tract that survives by feeding off you - your nutrients, your red blood cells, even the bacteria in your gut. Intestinal parasites range from microscopic protozoa like Giardia and Cryptosporidium, to parasitic worms like roundworm, hookworm, and tapeworm, to specific parasites like pinworms that spread easily between people.
There is a popular saying in current media: "if it has a pulse, it has parasites" suggesting that they are much more present than previously thought. Parasites are a normal part of a healthy microbiome ecosystem, which is the balance of bacteria, protozoa, and yeasts inside our gastrointestinal system. The issue isn't having parasites, it's when the balance tips and they overgrow.
Three major sources for parasites are toxic metals, refined sugar, and the off-gases and metabolites from overgrown yeast in the body. When any of these are running high, you create the perfect environment for different types of parasites to move in and cause trouble. Parasites consume your food — especially sugars and refined carbohydrates — and certain parasites also feed off your red blood cells, which is why iron anaemia is one of the sneakier signs of parasites that often gets missed.
Parasite Lifecycle
Throughout the month, parasites cruise around the human body through our blood. During a full moon, parasites get a little frisky in the liver and small intestines, this is likely due to the increase of serotonin raising gut activity and the decrease of melatonin lowering immune system defences. Once the party is over, they travel up to the throat to lay their eggs where they are swallowed and the lifecycle repeats. This is also why timing matters so much when it comes to testing and more on that below.
Common Symptoms of a Parasite Infection in the Gut
One of the most frustrating things about a parasitic infection is how well it hides. The symptoms of a parasite infection overlap heavily with conditions like IBS, SIBO, and hormonal imbalances — which is exactly why so many people go undiagnosed for years. Parasites can cause a wide range of issues, and the signs can look very different depending on the person.
If you are like our clients, you may have encountered the possibility of parasites when looking into symptoms like:
Digestive problems: bloating, gas, diarrhoea, GI pain, nausea and vomiting
Fatigue
Skin issues like rashes and unexplained itchiness - often around the mouth, nose, anus, genitals, or even ears
Muscle and joint pain - certain intestinal parasites can actually invade the joint tissue directly
Problems sleeping, especially around a full moon
Night sweats and nightmares
Neurological issues and mood swings - brain fog, anxiety, and irritability are more connected to gut parasites than most people realise
Iron anaemia and other nutritional deficiencies — because parasites consume your food and nutrients before you can absorb them
Weight loss
Appetite swings - usually constant hunger, a feeling of never being full, or unusual cravings (especially for sugars and carbs)
TMJ and teeth grinding
Swollen lymph nodes
Parasites can also cause symptoms that seem totally unrelated to digestion, like skin flares, mood shifts, even waking at specific times during the night. If several of these ring a bell, it's worth exploring further.
How Do You Get Intestinal Parasites?
You can get parasites in more ways than most people think and a lot of them are pretty ordinary situations. The most common ways to get infected with a parasite include:
Diet - a diet high in sugar and refined foods creates the ideal gut environment for parasites to thrive, since parasites consume your food and sugar feeds them directly
Contaminated food or water - undercooked meat, unwashed produce, or drinking water from an unsafe source
Travel - visiting countries with lower sanitation standards increases your risk of intestinal parasitic infestations significantly
Person-to-person - specific parasites like pinworms spread through touch, and deposit parasite eggs onto anything they contact: door handles, bedding, clothing, toilet seats
Pets - animals carry different parasites that can transfer to humans
Soil contact - hookworm larvae can penetrate bare skin
The three major drivers that allow parasites to take hold? Toxic metals, refined sugar, and yeast overgrowth. Address these, and you start shifting the internal environment from one that parasites love to one they can't survive in.
Testing for Gut Parasites: How to Test for Intestinal Parasites
Parasite testing can present a challenge, because the parasite lifecycle is complicated. They can evade detection efficiently, causing a lot of false-negative test results. Standard stool tests ordered by a GP have real limitations here, and the symptom overlap between a parasitic infection and conditions like IBS or Crohn's makes it even harder to identify the root cause without targeted testing.
However, all is not lost. Two of our favourite labs are ParaWellness Research and Parasite Testing, both specialise in identifying intestinal parasites that conventional tests routinely miss. If you've had a standard test come back clear but still have symptoms, these are worth looking into.
It is best to perform the test during the full moon when the parasites are more active in the digestive tract and more likely to show up in a stool sample. Even then, a false-negative doesn't rule out the presence of a parasite it's always best to interpret results alongside your symptoms and with the support of a practitioner who understands the lifecycle.
Treatment Options: How to Get Rid of Parasites
Here's where we do things a little differently. Parasites are not usually the first priority in a layered phase-based healing approach — with a small exception being cases where histamines are very high. In our clinical experience working with hundreds of clients, when you improve digestion first, you create an uninhabitable environment for parasites to thrive and they naturally can leave the microbiome ecosystem.
Parasites take time to clear properly. Jumping straight to a cleanse without addressing what's feeding them often means they come right back.
Layer 1: Improve Digestion and Diet
A diet like GAPS (Gut and Physiology Syndrome) significantly reduces the main food sources for parasites and includes antiparasitic foods across the stages — like animal fats, beet kvass, bitters, and pumpkin seeds. Cutting out sugar and foods found in refined foods — packaged snacks, white flour, alcohol — starves parasites of their primary fuel. Focus on restoring your intestinal tract with bone broth, fermented foods, and whole nutrient-dense meals that rebuild the bacteria in your gut and support the gut lining.
Layer 2: Address Heavy Metals
To address toxic metals in the body — like aluminium and mercury, which feed parasites — we recommend a supportive detoxification process that is gentle and non-aggressive rather than chelation. Two helpful minerals for fighting off parasites are silica and sulphur in the form of MSM — since silica helps the body detoxify aluminium excess and sulphur helps rebalance minerals and increases excretion of heavy metals.
Layer 3: Address Mold and Fungal Infections
After laying the foundation to improve digestion and repair mineral deficiencies, then we can look into other layers that drive parasites — like mold and fungal infections. Addressing these also removes food sources for the parasites and reduces the toxins that suppress or burden the immune system, so it can begin focusing on any left-over parasites. There is a significant overlap between mold illness and parasites — mold's mycotoxins suppress the immune system and create an environment where parasites proliferate and are never properly cleared.
Layer 4: Active Parasite Protocol
The final layer is actively targeting the parasites with an herbal protocol. It is always best to work with a practitioner to determine your sensitivity levels and how strong of a method is needed for parasite removal without compromising the microbiome. A favourite method of ours is Cellcore's Parasite Cleanse. It helps clear parasites quickly and with fewer side effects than conventional pharmaceutical approaches when used alongside proper gut support. Sign up here with the Patient Direct Code: rAaTCUIW
Gut Health, Autoimmunity & the Wider Effects of Parasites in the Body
Parasites don't just live quietly in your gut. They interact with your immune system, your nervous system, your hormones, and your emotional health — and understanding this bigger picture is what makes our approach different.
Parasites activate our immune system in positive and negative ways. On the positive side, parasites can prompt the immune system to respond without causing major damage, allowing the immune system to "practise" and be more ready to battle bigger threats. In fact, some autoimmune conditions are now being treated by using parasites to help regulate the innate immune system — the research is genuinely fascinating (https://pmc.ncbi.nlm.nih.gov/articles/PMC5401880/).
However, in an immune system already activated by toxins, overgrowths, and nutrient deficiencies, parasites can aggravate the problem. Parasites can also trigger autoimmune disease with a neat trick called "molecular mimicry" — meaning your immune system can begin to attack your own human tissue because the parasites blend in. Not enough to escape an attack from the immune system, but enough that the immune system starts to attack actual human cells, too.
Parasites and Histamine Intolerance
In the case of histamine intolerance, parasites directly stimulate the mast cells which act as the fire station of the immune system. The fire station then deploys its firefighters — like histamines — to attack what alerted the mast cells. If the body already has overactive mast cells or a liver too compromised to flush out excess histamines, parasites are not helping the situation. If you have sensitivity to histamine, mold, or food intolerance, this connection is worth paying close attention to.
Parasites and Mold Illness
There is also a big overlap between mold illness and parasites, with mold's mycotoxins suppressing the immune system and creating an excellent environment for parasites to proliferate. The combination of yeast byproducts feeding the parasites and the immune system being downregulated from mycotoxins means parasites are being fed and are also not being cleaned out by the immune system. The resulting gut imbalances — disrupted gut lining, altered bacteria in your gut, compromised gut lining integrity — make it very hard to fully recover without addressing both.
The Gut-Brain Connection
Your nervous system is deeply connected to your gut. Parasites can affect brain chemistry directly — since most of your serotonin is produced in the gut, a disrupted gut from parasitic infection affects your brain and mood more than most people expect. Brain fog, anxiety, and mood swings aren't just in your head.
Emotions and Parasites
You might experience a recurrence of parasites, especially if you have issues with setting boundaries or if you have had a history of relationships that are one-sided. The nervous system is intricately connected to our gut and immune system and so there's often an emotional component to a parasite infection that is out of balance in the body.
The very nature of a parasite is like a hijacker or something that gets more than it gives. Often it's important to take inventory of your relational dynamics and energetic exchanges — not just with other people, but with your job or other areas of your life, to help overcome parasitic overgrowth. For example, shifting your mindset and saying to the parasites "thank you for being here, you have helped me grow, but I don't need you anymore — it's time for you to leave," and then surrender to the process and practise setting more boundaries in your life.
We Teach Our Clients Not to Fear Parasites
We teach our clients not to fear parasites, since they have a very important role in the body. In a balanced ecosystem, they're part of how the body works. The goal is to restore the conditions where parasites can't overgrow: a strong, nourished gut, a well-regulated immune system, clean mineral balance, and clear energetic boundaries.
If you're ready to dig deeper, reach out to our team. We work with clients one-on-one to build a personalised, phased approach to gut health and when the time is right, that includes addressing gut parasites directly