| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Vitamin C
MessagePROTECT FROM LIGHT AND SEND TO SPECIMEN PROCESSING ASAP.
OVERNIGHT FASTING IS PREFERRED. REFRAIN FROM EATING FRUITS AND FROM TAKING VITAMIN C SUPPLEMENTS FOR 24 HOURS PRIOR TO COLLECTION.
PROTECT FROM LIGHT. CENTRIFUGE WITHIN ONE HOUR AND SHIP IN AMBER TUBE OR WRAPPED IN ALUMINUM FOIL.
OVERNIGHT FASTING IS PREFERRED. REFRAIN FROM EATING FRUITS AND FROM TAKING VITAMIN C SUPPLEMENTS FOR 24 HOURS PRIOR TO COLLECTION.
PROTECT FROM LIGHT. CENTRIFUGE WITHIN ONE HOUR AND SHIP IN AMBER TUBE OR WRAPPED IN ALUMINUM FOIL.
Test Code
929
Alias/See Also
LAB671
CPT Codes
82180
Preferred Specimen
1 mL frozen serum - protected from light
Patient Preparation
Overnight fasting is preferred.
Refrain from eating fruits and from taking vitamin C supplements for 24 hours prior to collection.
Minimum Volume
0.5 mL
Other Acceptable Specimens
Plasma collected in: Sodium heparin (green-top) tube protected from light • Foil wrapped transport tube protected from light
Instructions
Centrifuge within 1 hour of collection. Immediately separate serum from the cells into a clean, plastic transport tube. Freeze. Protect from light.
If unable to centrifuge immediately, sample should be covered with aluminum foil immediately and placed on ice until serum can be separated from cells. Transport to the laboratory frozen.
If unable to centrifuge immediately, sample should be covered with aluminum foil immediately and placed on ice until serum can be separated from cells. Transport to the laboratory frozen.
Transport Container
Amber transport tube
Transport Temperature
Frozen
Specimen Stability
Room temperature: Unacceptable
Refrigerated: Unacceptable
Frozen -20° C: 8 hours
Frozen -70° C: 35 days
Refrigerated: Unacceptable
Frozen -20° C: 8 hours
Frozen -70° C: 35 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolysis • Lipemia • Received room temperature • Received refrigerated • Not protected from light • EDTA plasma • Lithium heparin plasma • Thawed samples
Methodology
Chromatography/Mass Spectrometry
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 FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Setup Schedule
6: 00 a. M. Tues-sat
Report Available
3-4 days
Reference Range
| Female | 0.3-2.7 mg/dL |
| Male | 0.2-2.1 mg/dL |
Clinical Significance
Vitamin C is an antioxidant involved in connective tissue metabolism, drug-metabolizing systems, and mixed-function oxidase systems to list a few. Vitamin C deficiency causes scurvy; manifestations include impaired formation of mature connective tissue, bleeding into the skin, weakness, fatigue, and depression.
Performing Laboratory
| Quest Diagnostics Nichols Institute |
| 27027 Tourney Road |
| Valencia, CA 91355-5386 |