Abetalipoproteinemia, is an inherited (autosomal recessive) very rare disorder that causes malnutrition by blocking absorption of fat and vitamins in the intestines and liver. According to the National Center for Advancing Translational Sciences, the disorder is treatable.

Symptoms can include:

   -In infants, underdevelopment or slow growth

   -Diarrhea

   -Abnormally shaped red blood cells, known as acanthocytosis