Vitamin A (Retinol)
Test Summary
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.
Aliases
- N/A
Specimen Collection
Special Instructions
N/A
Preferred Specimen
2 mL serum
Minimum Volume
0.7 mL
Instructions
See Vitamin Collection Link
Patient Preparation
Overnight fasting is required.
Storage
Amber tube, or foil wrapped plastic screw-cap vial (protected from light)
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
- Room temperature: 24 hours
- Refrigerated: 7 days
- Frozen: 28 days
Limitations
Results may be elevated in women on oral contraceptives.
Other Acceptable Specimens
N/A
Unacceptable Specimens
Received room temperature; received refrigerated but not protected from light
Order Code
VITA
EPIC (Premier) Code
LAB419
Includes
N/A
CPT Code
- 84590
Billing Code
- 670752
CPT Statement
Methodology
Chromatography
FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the U.S. Food and Drug Administration. The FDA has determined that such clearance or approval is not necessary. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Physician Attestation of Informed Consent
N/A
Testing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly VA, 20153
14225 Newbrook Drive
Chantilly VA, 20153
Department
Reference Testing
Reference Range
| 1-6 Years | 20-43 mcg/dL |
| 7-12 Years | 26-49 mcg/dL |
| 13-19 Years | 26-72 mcg/dL |
| Adult | 38-98 mcg/dL |
Setup Schedule / Expected Turnaround Time
Monday - Saturday; Report available: 3 - 4 days
Resources
Specimen Collection
Special Instructions
N/A
Preferred Specimen
2 mL serum
Minimum Volume
0.7 mL
Instructions
See Vitamin Collection Link
Patient Preparation
Overnight fasting is required.
Storage
Amber tube, or foil wrapped plastic screw-cap vial (protected from light)
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
- Room temperature: 24 hours
- Refrigerated: 7 days
- Frozen: 28 days
Limitations
Results may be elevated in women on oral contraceptives.
Other Acceptable Specimens
N/A
Unacceptable Specimens
Received room temperature; received refrigerated but not protected from light
Result Information
Methodology
Chromatography
Testing Laboratory
N/A
Reference Range
| 1-6 Years | 20-43 mcg/dL |
| 7-12 Years | 26-49 mcg/dL |
| 13-19 Years | 26-72 mcg/dL |
| Adult | 38-98 mcg/dL |
Setup Schedule / Expected Turnaround Time
Monday - Saturday; Report available: 3 - 4 days