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Lab Manual for Moffitt-Long and Mount Zion

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Tocopherols

Item Value
Approval req'd? No
Available Stat? No
Test code VITE
Performed by Quest
Sendout? Yes
Method HPLC
Patient Preparation An 8 hour fast before specimen collection is preferred.
Collection Instructions Wrap collection tube in aluminum foil to protect from light.
Container type Gold top
Amount to Collect 4 mL blood
Sample type Serum
Preferred volume 2 mL serum
Min. Volume 0.6 mL serum
Processing notes Freeze serum at -20C in dark pour-off vial. Order Quest # 5009N
Units mg/L
Normal range
Age alpha-tocopherol
Cord blood at term 1.8-5.8 mg/L
4-11 months < 9.1 mg/L
1-2 years 2.9-16.6 mg/L
3-5 years 5.5-11.8 mg/L
6-8 years 4.6-14.8 mg/L
9-11 years 6.2-14.3 mg/L
12-17 years 3.7-12.4 mg/L
> 17 years 5.7-19.9 mg/L


Age beta/gamma tocopherols
3-17 years 0.5-3.8 mg/L
> 17 years < 4.4 mg/L
Synonyms Vitamin E; Alpha Tocopherol
Turn around times Test run Monday-Friday. Turnaround time: 2-4 days.
Additional information To convert mg/L to µmol/L (SI units) multiply by 2.32.

This assay measures alpha- (the main source of activity) and combined beta- and gamma-tocopherols. The bioavailability of Vitamin E may be impaired in hyperlipidemic states, in which it may be useful to simultaneously measure Cholesterol, Total or Lipids, Total. The Vitamin E/lipid ratios calculated as (100 x Vitamin E [in mg/L])/(lipid [in mg/dL]) are normally > 3 mg/g for E/cholesterol or > 1 mg/g for E/total lipids.
CPT coding 84446-90
LOINC code 1823-4
Last Updated 10/2/2010 11:52:41 AM
Entry Number 930
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