Vitamin A
Investigation : Vitamin A
Specimen type : Serum
Spec container : Serum Gel 
Volume required : 5 ml
Reference range : 1.1 - 2.5 µmol/l
Turnaround : <14 days

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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