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Ascorbic Acid

Item Value
Approval req'd? No
Available Stat? No
Test code ASCA
Performed by Quest
Sendout? Yes
Method Capillary electrophoresis
Patient Preparation An 8 hour fast before specimen collection is preferred. Patient should refrain from taking vitamin supplements 24 hours prior to collection.
Collection Instructions Wrap the tube in aluminum foil to protect it from light.
Container type Gold top
Amount to Collect 4 mL blood
Sample type Serum
Preferred volume 2 mL serum
Min. Volume 1 mL serum
Processing notes Aliquot serum in dark pour-off vial. Freeze serum at -20C. Do not thaw frozen specimen. Order Quest # 19034P
Ref Lab Rejection Criteria Received at room temperature or refrigerated
Units mg/dL
Normal range 0.20-1.90 mg/dL
Synonyms Ascorbate; Vitamin C; Vit. C; Vit C
Stability Frozen at -20C 10 days.
Turn around times Set up 5x per week. Turnaround time: 3-5 days
Additional information Clinical use: assessment of nutritional status. To convert mg/dL to µmol/L (SI units) multiply by 56.78.

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.
CPT coding 82180-90
LOINC code 1903-4
Last Updated 10/2/2010 11:51:21 AM
Entry Number 77
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