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VITAMIN A

 
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Description
 

CPT Code(s)

84590

Methodology

High Performance Liquid Chromatography (HPLC)

Limitations

Results may be elevated in women on oral contraceptives.

Reference Range(s)

1-6 Years20-43 µg/dL
7-12 Years26-49 µg/dL
13-19 Years 26-72 µg/dL
Adults38-98 µg/dL

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 rarely due to inadequate diet. Vitamin A, vitamin E, and carotene are always extracted and detected simultaneously. This is a free vitamin A (retinol).

Alternative Name(s)

Retinol


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