Vitamin A (Retinol)
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, Vit A alcohol, Vit A1, Vit A1 alcohol, Vitamin A alcohol
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.
Frequently asked questions
- What is a normal Vitamin A (Retinol) level?
- A typical reference range for Vitamin A (Retinol) is 30–65 µg/dL (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- What units is Vitamin A (Retinol) measured in?
- Vitamin A (Retinol) is most commonly reported in µg/dL. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do Vitamin A (Retinol) reference ranges come from?
- BloodId uses ABIM standard reference ranges and educational information from MedlinePlus (see our methodology). Reference ranges still vary by lab, age, and sex, so always compare against your own report.
- Can I track Vitamin A (Retinol) over time?
- Yes. Upload results from any lab and BloodId charts your Vitamin A (Retinol) over time against its reference range, so you can see whether the trend is rising, falling, or stable.
Related biomarkers
Source: MedlinePlus, U.S. National Library of Medicine
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