Familial Hypobetalipoproteinemia: Causes, Symptoms, and Treatment
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 2, 2026.
What kind of doctor treats Familial Hypobetalipoproteinemia?
A primary care doctor usually manages this condition with routine testing and diet guidance. When problems appear, patients may be referred to a gastroenterologist or a hepatologist, a liver specialist. A geneticist may confirm the diagnosis, and a dietitian often helps plan meals.
What it is
Familial hypobetalipoproteinemia is a genetic condition passed down in families. It causes very low levels of LDL cholesterol, often called "bad" cholesterol. Many people feel fine and only learn about it from a blood test. Some people have liver, intestinal, or nervous system problems because their bodies cannot absorb fats the usual way.
Symptoms
Many people have no symptoms. When symptoms do happen, they often involve trouble digesting fat, leading to fatty stools, bloating, and poor weight gain in children. Fat can build up in the liver, and severe cases can affect balance and movement.
Causes and who gets it
The condition is caused by mutations in a gene that helps make particles carrying cholesterol and fats through the blood, most commonly APOB. Inheriting one changed copy usually causes a milder form; inheriting two changed copies, one from each parent, causes a more severe form.
How doctors diagnose it
Doctors start with a blood test measuring cholesterol and other fats. Finding very low LDL cholesterol, especially in several family members, raises suspicion. They may also test liver function, check fat-soluble vitamin levels, and use genetic testing to confirm the diagnosis.
Treatment
Treatment depends on how the condition affects each person. People with no symptoms may only need regular checkups. When fat absorption is poor, doctors often recommend a diet with less fat and more medium-chain triglycerides, which are easier to absorb. Vitamins A, D, E, and K are often supplemented.
When to see a doctor
Anyone with very low cholesterol on a blood test should talk to a doctor. Children who fail to gain weight properly or have a parent with this condition should be checked. Yellowing skin or eyes, belly swelling, unusual tiredness, numbness, or balance trouble need prompt attention.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. Either can order blood tests, prescribe vitamin supplements, and coordinate diet planning, referring patients to specialists when needed.
Common questions
Is familial hypobetalipoproteinemia dangerous?
For many people, it causes few or no problems. It may even lower the usual risk linked to high LDL cholesterol. People with two changed gene copies can develop serious liver and nerve problems over time. Regular monitoring helps doctors find and treat problems early.
Can it be cured?
There is no cure, because the condition comes from a change in a person's genes. Treatment can manage symptoms and prevent complications for many people. How well treatment works differs from person to person.
Should my family members get tested?
Because this condition runs in families, close relatives may benefit from a cholesterol blood test. If a specific gene change is known, genetic testing can show who else carries it. A doctor or genetic counselor can help families decide on testing.
Do I need to change my diet?
People who have trouble absorbing fat often do better with less fat in their meals. Medium-chain triglycerides can be used as a substitute. Vitamin supplements are commonly needed. A doctor or dietitian should guide any diet plan.
Sources
- MedlinePlus - Familial hypobetalipoproteinemia
- NIH Genetic and Rare Diseases Information Center - Familial hypobetalipoproteinemia 1
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
