The value of measuring serum cholesterol-adjusted vitamin E in routine practice

Annals of Clinical Biochemistry
Loretta FordJonathan Berg

Abstract

If the lipid concentration is not taken into account, then in certain situations the vitamin E status of a patient may be wrongly assigned based on serum measurement alone. In this study, the utility of using the calculated vitamin E:cholesterol ratio to determine vitamin E status was compared to the measurement of vitamin E alone. The vitamin E:cholesterol ratio was measured in 457 patient samples received for routine vitamin E analysis. Serum vitamin E concentration was determined by high-performance liquid chromatography (HPLC) with UV detection and cholesterol concentration, using a Roche analyser and reagents. The mean vitamin E concentration and vitamin E:cholesterol ratio for the total study population was 22.0 micromol/L and 5.9 micromol/mmol, respectively. Of the 457 patient samples analysed, 57 (12.5%) were found to have a low vitamin E concentration, but only 25 (47%) of these patients had a low vitamin E:cholesterol ratio as well. Two patients both with cholestasis had a normal vitamin E concentration but low vitamin E:cholesterol ratio. The determination of vitamin E:cholesterol ratios can be used to better define the vitamin E status of patients with disease states or disorders likely to raise LDL cholesterol, for...Continue Reading

Citations

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