02/01/2026
Parasites in the Human Body What Science Actually Says
Parasites can live in the human body, but their effects vary widely. Many infections are mild, treatable, or even symptom-free. Here’s a clear, evidence-based look at what some common parasites can do not what they always do.
Tapeworms
• Live in the intestines
• Can absorb nutrients from food
• Heavy infections may lead to vitamin deficiencies, but many people have no symptoms
Roundworms (Ascaris)
• May cause abdominal pain, bloating, or diarrhea
• Severe cases can lead to intestinal blockage
Liver flukes
• Affect the liver and bile ducts
• Can cause inflammation, abdominal pain, and abnormal liver tests
Pinworms
• Very common, especially in children
• Cause a**l itching and sleep disturbance
• Usually mild and easily treated
Hookworms
• Attach to the intestinal wall and feed on blood
• Can cause iron-deficiency anemia over time, especially in vulnerable groups
🔍 Important to know:
• Many people with parasites have no symptoms
• Diagnosis requires proper medical testing
• Parasite infections are treatable with prescribed medications
• “Parasite cleanses” and home remedies are not supported by medical evidence
If you have ongoing digestive issues, unexplained anemia, or persistent symptoms, a healthcare professional can help with proper testing and treatment.