Retinol and β-Carotene Panel
10 days
Vitamin A: Liquid chromatography/tandem mass spectrometry (LC/MS-MS), Carotene: High-pressure liquid chromatography (HPLC) with UV detection
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Assesses vitamin A status and dietary carotene intake.
Serum, protected from light
Two aliquots: 0.8 mL each
Red-top tube or gel-barrier tube, amber plastic transport tube with amber top.
No special preparation is required for this test. You may eat, drink, and take your medications as normal, unless instructed otherwise by your healthcare provider.
Protect from light. If amber tubes are unavailable, cover standard transport tubes completely, top and bottom, with aluminum foil. Identify specimens with the patient's name directly on the containers AND on the outside of the aluminum foil. Secure with tape.)
| Temperature | Period |
|---|---|
| Room temperature | 14 days |
| Refrigerated | 14 days |
| Frozen | 14 days |
| Freeze/thaw cycles | Stable x3 |