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Failure of vitamin E in clinical trials: is gamma-tocopherol the answer?

Sridevi Devaraj1, Ishwarlal Jialal

  • 1Laboratory for Atherosclerosis and Metabolic Research, Department of Pathology and Laboratory Medicine, University of California-Davis Medical Center, Sacramento, USA.

Nutrition Reviews
|September 30, 2005
PubMed

Insights

Oxidative stress and inflammation are key in atherosclerosis. Studies on alpha-tocopherol (AT) failed, possibly due to decreased gamma-tocopherol (GT), an antioxidant with anti-inflammatory effects beneficial for cardiovascular health.

Area of Science:

  • Cardiovascular Science
  • Nutritional Biochemistry
  • Oxidative Stress Research

Background:

  • Atherosclerosis pathogenesis involves oxidative stress and inflammation.
  • Clinical trials of alpha-tocopherol (AT) for cardiovascular disease prevention have been unsuccessful.
  • AT supplementation is linked to reduced levels of gamma-tocopherol (GT).

Purpose of the Study:

  • To investigate the role of gamma-tocopherol (GT) in cardiovascular disease (CVD) prevention.
  • To evaluate the therapeutic potential of GT, alone or combined with AT.
  • To understand the relationship between GT, AT, and atherosclerosis.

Main Methods:

  • Review of existing clinical trial data on AT and tocopherol levels.
  • Analysis of the antioxidant and anti-inflammatory properties of GT.
  • Correlation analysis between plasma GT levels and cardiovascular disease incidence.

Main Results:

  • Plasma GT levels are inversely associated with cardiovascular disease risk.
  • GT exhibits potent antioxidant and anti-inflammatory activities.
  • AT supplementation negatively impacts GT levels.

Conclusions:

  • Gamma-tocopherol (GT) shows promise for cardiovascular disease prevention.
  • Further research using pure GT, alone or with AT, is warranted.
  • Understanding tocopherol interactions is crucial for effective CVD prevention strategies.

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