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Vitamin A (Retinol)

Order Code CH847
Turnaround Time 4 days
Test Includes


Specimen Requirements
Specimen Source
Transport Container
(Specimen Container)

SST (Tiger Top) protected from light. Amber transport tube.

Preferred Specimens
2 mL serum - protected from light
Minimum Volume (uL)
0.7 mL
Collection Instructions
(Transport Temperature)
Transport Refrigerated (cold packs)
Specimen Stability
Temperature Period
Room temperature 24 hours
Refrigerated 7 days
Frozen 28 days
Reject Criteria

Grossly hemolyzed, Heavily lipemic sera, Received in Serum separator tube (SST) or red-top tube (no gel) collection tube, Received room temperature, Not light protected , Plasma

Special Instructions

Separate from cells as soon as possible after clotting. Send serum in an amber tube. If an amber tube is not available, wrap tube in aluminum foil to protect from light. Patient Preparation: Overnight fasting is required.

Test Details
High Performance Liquid Chromatography (HPLC)
Clinical Significance

Vitamin A is critical for vision, growth, and many cell functions. High concentrations of Vitamin A are seen with renal failure, but this is not associated with toxicity and excessive ingestion. High concentrations are associated with bone fractures. Low concentrations of Vitamin A are consistent with fat malabsorption and are rarely due to inadequate diet.

Reference Ranges

20 – 43 mcg/dL (1 – 6 Years)
26 – 49 mcg/dL (7 – 12 Years)
26 – 72 mcg/dL (13 – 19 Years)
38 – 98 mcg/dL (Adult)