Vitamin A (Retinol) in Serum/Plasma

Why Is This Test Done?

Your healthcare provider may order this test if you have symptoms of vitamin A deficiency (such as night blindness, dry skin, or frequent infections) or if you’re at risk due to poor diet, malabsorption issues, or certain medical conditions. It may also be used to monitor vitamin A levels in patients receiving supplements or undergoing treatment for conditions like cystic fibrosis.

What Does the Result Mean?

Results can indicate whether your body has enough vitamin A or if you may need to adjust your diet or supplements. While reference ranges vary by lab, lower levels might suggest deficiency, while higher levels could indicate over-supplementation or certain liver conditions.

Sample Collection and Preparation

A blood sample is drawn from a vein in your arm. You may feel a small pinch when the needle is inserted, but the procedure is quick. If you’re on blood thinners or have clotting issues, your provider may give specific instructions to ensure accurate results.

Common Causes of Abnormal Results

Low vitamin A levels can result from poor dietary intake, malabsorption (e.g., celiac disease, Crohn’s), liver disease, or certain medications. High levels may be linked to liver disease, over-supplementation, or rare genetic conditions.