Vitamins A, E, C, and beta-carotene

What this test is

Vitamins A, E, and C, plus a related substance called beta-carotene, can be checked with a blood test. These vitamins matter most if your body has trouble absorbing fat. This can happen after some weight-loss surgeries, with some liver or pancreas problems, or with cystic fibrosis. In those cases, doctors check and track these levels often. Vitamin C is a bit different. Very low vitamin C can cause a problem called scurvy. This is more common than people think, especially with a very limited diet or heavy alcohol use. For most other people, checking these vitamins as a routine panel for tiredness is not well supported. Beta-carotene on its own does not have a clear, proven use as a test. If you have a condition that affects how you absorb nutrients, or a very limited diet, tell your doctor. Then the right test can be chosen.