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Vitamin A

Retinol Serum Retinol Plasma Vitamin A
Serum (SST, protect from light) µmol/L

About this test

Fat-soluble vitamin essential for vision (especially night vision), immune function, and epithelial cell differentiation.

Reference Ranges

Sex Age Range Notes
All ≥ 18 yrs 1.05 – 2.8 Adult

Clinical Interpretation

Low / Decreased
Deficiency — night blindness, xerophthalmia, increased infection susceptibility. Common in low-income countries and malabsorption.
High / Increased
Toxicity — liver damage, intracranial hypertension, teratogenicity. Often from supplement excess.

Related Tests

Prealbumin Zinc
Specimen
Serum (SST, protect from light)
Reporting Unit
µmol/L
Category
💊 Vitamins

⚠ Clinical Note
Reference ranges are indicative. Always interpret results in the context of the individual patient and local laboratory reference intervals, which may vary.