Beta-carotene

Alternative names:

carotene

Normal values:

The normal range is 60 to 200 mcg/dl.

Note: mcg/dl = micrograms per deciliter

What abnormal results mean:

Lower-than-normal levels may indicate a diet inadequate in beta-carotene or a problem absorbing fat-soluble substances (steatorrhea).

Elevated levels may indicate hypervitaminosis A (excessive vitamin A causing headaches, yellow skin, loss of appetite, nausea, diarrhea, dry and itchy skin, hair loss, bone pain, and cessation of menstruation in women). During pregnancy, an excess of vitamin A can cause birth defects.