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Living with Idiopathic malabsorption due to bile acid synthesis defects

A rare intestinal condition with too many bile acids, which leads to long-lasting watery diarrhea.

Understanding Idiopathic malabsorption due to bile acid synthesis defects

Idiopathic malabsorption due to bile acid synthesis defects is an intestinal disease in which the body makes too many bile acids, causing chronic watery diarrhea.

GARD describes the cause as unknown. The main feature is long-lasting watery diarrhea.

Signs & symptoms

GARD doesn't list specific symptoms for this condition yet. Its summary describes:

  • Long-lasting watery diarrhea

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include digestive system specialists and genetic specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

Care & treatment

Care team
Digestive system specialists (gastroenterologists); Genetic specialists (geneticists)
Expert care
Ask about multidisciplinary care centers for rare conditions
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with rare disease patient organizations for support
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
What tests confirm that bile acids are the cause of the diarrhea?
How can we tell if my body is absorbing nutrients well?
Would genetic testing be useful?

Quick facts

GARD says changes in genes cause this condition, but the cause is described as unknown. It is linked to the body making too many bile acids.

GeneticGastrointestinalInherited Metabolic

Also known as: idiopathic bile acid malabsorption; intestinal malabsorption due to bile acid synthesis defect

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Idiopathic malabsorption due to bile acid synthesis defectsGARD ID 19046 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Idiopathic malabsorption due to bile acid synthesis defects.

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