Vitamin A (retinol) measures the level of this fat-soluble vitamin in your blood. Vitamin A is essential for vision, immune function, reproduction, and cellular communication.
Category: Vitamins & Minerals
Also known as: vitamin a, retinol, vit a, serum retinol
Reference range: 30–65 µg/dL (Source: ABIM)
Standard unit: µg/dL
High values may indicate
High vitamin A levels may indicate vitamin A toxicity (hypervitaminosis A) from excessive supplementation, which can cause liver damage, headaches, bone pain, and birth defects.
Low values may indicate
Low vitamin A levels may indicate dietary deficiency, malabsorption disorders, liver disease, or zinc deficiency, and can lead to night blindness, dry skin, and impaired immune function.