Intestinal Parasites: Causes, Symptoms, and Natural Support Strategies

Intestinal parasites are organisms that live in or on another organism (the host) and rely on the host for nourishment during part or all of their life cycle. Many different organisms are considered parasites, including bacteria, protozoa, worms, and some insects. Parasites can enter the human body through the mouth or skin, often via contaminated food, water, soil, or poor hygiene.

Once inside the body, parasite larvae can mature in the intestines and begin to interfere with digestion, immunity, and nutrient absorption. While some infections cause only mild symptoms, others can lead to significant digestive and systemic health issues if left untreated.

Symptoms of Intestinal Parasites

Mild to moderate symptoms may include:

  • Abdominal pain or cramping
  • Nausea
  • Diarrhoea
  • Gas and bloating
  • Fatigue
  • Occasional blood in the stool

More severe infections may cause:

  • Persistent abdominal pain
  • Chronic fatigue
  • Vomiting
  • Weight loss
  • Worms visible in vomit or stools
  • Worms emerging from the nose or mouth (in advanced cases)

If left untreated, intestinal parasites may contribute to allergies, chronic digestive disorders, liver congestion, bowel inflammation, nutrient deficiencies, and lowered immunity.

Diagnosis may involve analysis of stool, blood, urine, or phlegm samples to accurately identify the parasite and guide treatment.

Diet Tips to Support Parasite Elimination

Diet plays a key role in creating an environment that discourages parasite survival:

  • Increase bitter foods to stimulate digestion and bile flow: lemon juice, apple cider vinegar, rocket, endive, radicchio
  • Use coconut oil in cooking or smoothies — it contains caprylic acid, a short-chain fatty acid that inhibits parasites and harmful microbes
  • Eat garlic, onions, and pumpkin seeds, traditionally used for parasite support
  • Increase fibre intake with foods or supplements such as slippery elm or psyllium husks to promote bowel elimination
  • Reduce parasite-feeding foods: sugar, refined carbohydrates, dairy, wheat, alcohol, tea, coffee, and soft drinks
  • Stay well hydrated to support bowel cleansing
  • Use digestive-supportive herbal teas such as ginger, echinacea, elecampane, peppermint, and chamomile
  • Begin each morning with warm water and half a lemon to support liver and bowel function
  • Limit excessive dietary fats, which may slow digestion
  • Avoid raw or undercooked meat

Lifestyle Factors That Influence Parasites

  • Low stomach acid (hypochlorhydria) can increase susceptibility to parasites; bitter foods and digestive enzymes may help, especially if bloating, belching, or constipation are present
  • Wear gloves when gardening and wash hands thoroughly after soil contact, toileting, and nappy changes
  • Practice good food hygiene and avoid untreated water
  • Support liver and digestive health, which are central to parasite resistance and elimination

Naturopathic Remedies for Parasites

🌿 Herbal Medicine

Traditionally used antiparasitic herbs include: Pau d’Arco, Wormwood, Dandelion, Rhubarb, Black Cumin, Oregon Grape, Bitter Orange, Cloves, Gentian, Neem, Golden Seal, Garlic, Thuja, Black Walnut, Olive Leaf, Echinacea, Agrimony, and Barberry.

🦠 Probiotics

Help restore healthy gut flora, support immunity, and reduce the ability of parasites to colonise the bowel.

🌾 Fibre Support

Slippery elm or psyllium husks assist bowel regularity and help expel parasites and their waste via the stool.

⚡ Diatomaceous Earth

Diatomaceous earth (food-grade) may help with intestinal parasites by physically damaging parasites and their eggs as it passes through the gut, and by supporting bowel cleansing and toxin elimination. It works mechanically rather than chemically, so it’s best used alongside dietary changes, herbal antiparasitic support, and good digestion rather than on its own. Always take with plenty of water for safety.

🍃 Liver Support

Herbs such as dandelion, bupleurum, schizandra, gentian, and milk thistle support bile production, detoxification, and parasite clearance.

Intestinal parasites are more common than many people realise and can significantly impact digestion, immunity, and overall health. A naturopathic approach focuses on identifying the parasite, supporting digestion and elimination, restoring gut health, and addressing lifestyle factors to prevent reinfection. Always seek professional guidance and appropriate testing for safe and effective treatment.