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Retinyl Palmitate and Vitamin A

Important Note

This test is orderable by Seattle Children's providers to assess Vitamin A toxicity. 

Clinical System Name

Miscellaneous Test


A Vitamin


Retinyl palmitate


Sample Requirements

Specimen: Whole Blood

Container(s): Dark Green/Sodium Heparin, Lt. Green/Lithium Heparin Microtainer, Gold SST, Lavender/EDTA, or Lavender/EDTA Microtainer

Preferred Vol: 2.0 mL

Minimum Vol: 0.4 mL



Processing Instructions

Reject due to: Whole blood or body fluids other than serum or plasma. Room temperature specimens greater than four hours old.

Spin: Y

Aliquot: Y

Temp: -20 C

Storage location: Separate serum or plasma from cells within TWO hours of collection. Deliver specimen to the CPA freezer, Send Outs rack.


Off-site collection: Separate serum/plasma from cells within TWO hours of collection. Freeze serum or plasma.


Specimen Type Temperature Time
Serum or Plasma Room temp

4 h

  Refrigerated 1 m

1 y



STAT Performed TAT
N Daily 1 - 5 d


Performing Laboratory

ARUP Laboratories

500 Chipeta Way
Salt Lake City, UT 84108-1221


Phone Number: (800) 522-2787


Department: Send Outs


Phone Number: (206) 987-2563

Reference Range

Vitamin A (Retinol)
Age Reference Interval
0 - 1 month
2 months - 12 years
13 - 17 years
18 years and older
0.18 - 0.50 mg/L
0.20 - 0.50 mg/L
0.26 - 0.70 mg/L
0.30 - 1.20 mg/L
Vitamin A (Retinyl Palmitate)  0-0.10 mg/L  



Method: Quantitative High Performance Liquid Chromatography

Analytical Volume: 0.2 mL Serum or Plasma


CPT Codes



Send Out Instructions

Reference Test Name: Vitamin A (Retinol), Serum or Plasma
Reference Test Number:



Send out Monday - Friday with the ARUP courier.