|Spec container||:||Serum Gel|
|Volume required||:||5 ml|
|Reference range||:||1.1 - 2.5 µmol/l|
Vitamin A deficiency <0.5 associated with night blindness and fat malabsorption. Correct interpretation may also require measurement of the vitamin A carrier protein, retinol binding protein (RBP), as decreases in RBP giving low vitamin A may not infer vitamin A deficiency.
Vitamin A excess >7.0   associated with liver damage.
Additional information on Vitamin A and its clinical use can be found here: Vitamin A.
Samples are acceptable if separated and stored within 48 hours - light protection in this time window isnít essential.
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