| (Biochemistry) |
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| 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 isn’t essential.
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