hormonal and metabolic disorders
Hypolipidemia
Hypobetalipoproteinemia
In hypobetalipoproteinemia, the LDL cholesterol level is very low. Usually, there are no symptoms and no treatment is required. In the most severe form of hypobetalipoproteinemia, almost no LDL cholesterol is present, and people have symptoms similar to those of abetalipoproteinemia. The diagnosis is made by measuring lipid levels in the blood. If family members have the disorder, the diagnosis is more likely. Treatment for the most severe form is similar to that of abetalipoproteinemia and includes vitamins A, E, D, and K and supplementation of fat in the diet. 