Blastocystis hominis: Symptoms, Diet Tips, and Natural Treatment Options

Paula Gallagher on 09/22/2025

The gut is home to trillions of microorganisms — many of them beneficial, some neutral, and others potentially harmful. One lesser-known organism that frequently appears in stool tests is Blastocystis hominis, a microscopic intestinal parasite.

But what does it mean if you test positive for Blastocystis? And how can you support your gut naturally?

What Is Blastocystis hominis?

Blastocystis hominis is a single-celled parasite found in the digestive tract. It's primarily spread through contaminated food or water and is more prevalent in regions with poor sanitation.

Surprisingly, not everyone with Blastocystis experiences symptoms. In fact, many people carry the organism without any issues. However, for some, it may contribute to ongoing digestive discomfort.

Common Symptoms of Blastocystis Infection

Diarrhea or loose stools
Abdominal pain or cramping
Gas and bloating
Nausea
Fatigue

Because symptoms vary widely, experts still debate whether Blastocystis is always harmful. For some, it may be part of the normal gut flora. For others, it may trigger chronic gut symptoms.

How Is Blastocystis Diagnosed?

Blastocystis is typically detected through a stool test. If no other explanation for your symptoms is found, your healthcare provider may consider treatment, especially if you're dealing with persistent gut issues.

Treatment Options for Blastocystis hominis

There’s no one-size-fits-all solution. Your treatment plan may depend on your symptoms, overall gut health, and test results.

1. Conventional Medicine

Doctors may prescribe antibiotics or antiparasitic medications. However, these treatments don’t always eliminate the parasite, and symptoms can recur.

2. Natural and Functional Approaches

Many people turn to integrative medicine and functional gut protocols to support recovery:

Probiotics - High-quality probiotics help restore microbial balance and may outcompete harmful organisms like Blastocystis.
Herbal Antimicrobials - Herbs like berberine, oregano oil, peppermint, and rosemary have shown antimicrobial properties against parasites.
Digestive Support
- Focus on a nutrient-dense, anti-inflammatory diet
- Stay well-hydrated
- Reduce sugar intake, which feeds harmful microbes
Immune System Support - Nutrients like vitamin C, zinc, and herbs such as goldenseal can support immune defense.

The Link Between Diet and Blastocystis

Blastocystis may thrive on certain carbohydrates and fermentable fibers. That’s where dietary adjustments can make a big difference.

What Are FODMAPs?

FODMAPs are fermentable carbs (like lactose, fructose, and sugar alcohols) that may worsen bloating, gas, and diarrhea. These can feed both good and bad microbes, including parasites.

Low FODMAP Diet for Blastocystis Relief

A low FODMAP diet can reduce digestive symptoms by limiting the fuel that unwanted microbes like Blastocystis need.

Short-Term Relief: Reduces bloating and cramping
Best Used Short-Term: Should be followed for 4–6 weeks, then reintroduced gradually under practitioner guidance

Supportive Foods to Balance the Gut

Pairing dietary changes with gut-healing foods can further improve outcomes:

Easily digestible proteins: chicken, fish, eggs, tofu
Cooked vegetables: zucchini, carrots, spinach
Gluten-free grains: quinoa, oats, white rice
Herbal teas: peppermint, ginger, chamomile for soothing digestion

Working With a Practitioner

Testing positive for Blastocystis hominis doesn’t always mean you need treatment. But if you’re experiencing symptoms like fatigue, bloating, or cramping, it's wise to work with a functional or integrative practitioner who understands gut health.

At Village Green Apothecary, we specialize in helping clients navigate digestive imbalances. Whether you need a targeted probiotic, herbal parasite support, or a custom gut-healing protocol, we’re here to guide you.

Time to Show Parasites the Exit

If you're struggling with symptoms linked to Blastocystis hominis or other digestive issues, our team is here to help.

→ Book a personalized nutrition consultation today and take the first step toward a healthier gut.

Frequently Asked Questions (FAQ)

What is Blastocystis hominis?

Blastocystis hominis is a single-celled intestinal parasite that may or may not cause symptoms, depending on the individual’s gut health.

How do you get Blastocystis?

It typically spreads through contaminated food or water, especially in areas with poor sanitation.

Is Blastocystis always harmful?

Not always. Some people carry it without symptoms, while others may experience digestive issues.

What are natural ways to treat Blastocystis?

Natural options include probiotics, herbal antimicrobials (like berberine and oregano oil), dietary changes, and immune support nutrients.

Should I follow a low FODMAP diet if I have Blastocystis?

A short-term low FODMAP diet may help relieve digestive symptoms, but it should be done with guidance to avoid disrupting healthy gut bacteria.

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