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Related Experiment Videos

alpha-Tocopherol supplements and high-density-lipoprotein-cholesterol levels.

J H Kalbfleisch1, J J Barboriak, B A Else

  • 1Research Service, Veterans Administration Medical Center, Milwaukee, Wisconsin 53193.

The British Journal of Nutrition
|January 1, 1986
PubMed
Summary

Vitamin E (alpha-tocopherol) supplementation did not consistently alter plasma high-density-lipoprotein cholesterol (HDL-C) levels in a 6-month study. This finding held true even for individuals with initially low HDL-C levels.

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Area of Science:

  • Biochemistry
  • Nutritional Science
  • Clinical Research

Background:

  • High-density-lipoprotein cholesterol (HDL-C) plays a crucial role in cardiovascular health.
  • Vitamin E, specifically alpha-tocopherol, is a potent antioxidant with potential lipid-modulating effects.
  • Previous short-term studies have yielded mixed results regarding vitamin E's impact on HDL-C.

Purpose of the Study:

  • To investigate the effect of daily alpha-tocopherol supplementation on plasma HDL-C levels over a 6-month period.
  • To analyze combined data from short-term and the present study to identify factors modifying alpha-tocopherol's effect on HDL-C.
  • To determine if alpha-tocopherol influences HDL-C levels differently in subjects with varying baseline HDL-C concentrations.

Main Methods:

  • A randomized, double-blind, placebo-controlled study involving seventy-eight volunteers.

Related Experiment Videos

  • Daily administration of alpha-tocopherol (728 mg) or a placebo for six months.
  • Meta-analysis of combined short-term (4-6 weeks) and the 6-month study data.

    • Main Results:

    • No consistent effect of alpha-tocopherol on plasma HDL-C levels was observed in either the 4-week combined data or the 6-month study.
    • Analysis of combined short-term and 6-month data revealed no significant difference in HDL-C changes between alpha-tocopherol and placebo groups.
    • This lack of significant difference was consistent even when analyzing subjects with initially low HDL-C levels.

    Conclusions:

    • Daily alpha-tocopherol supplementation at 728 mg does not appear to significantly alter plasma HDL-C levels in the general population.
    • The study did not identify baseline HDL-C levels as a significant modifying factor for alpha-tocopherol's effect on HDL-C.
    • Further research may be needed to explore potential subtle effects or specific subpopulations that might respond differently to vitamin E supplementation regarding HDL-C.