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Vitamin E supplements in asthma: a parallel group randomised placebo controlled trial
P J K Pearson1, S A Lewis, J Britton
1Division of Respiratory Medicine, University of Nottingham, Clinical Science Building, Nottingham City Hospital, Nottingham NG5 1PB, UK.
Thorax
|July 30, 2004
Summary
Vitamin E supplementation did not improve bronchial hyperresponsiveness in adults with asthma. This study found no added benefit of vitamin E to standard asthma treatments.
Area of Science:
- Clinical immunology
- Respiratory medicine
- Nutritional science
Background:
- Vitamin E intake is linked to lower asthma incidence.
- Antioxidant supplements, including vitamin E, can reduce ozone-induced bronchoconstriction.
Purpose of the Study:
- To investigate the effect of 6-week vitamin E supplementation on bronchial hyperresponsiveness in adults with asthma.
Main Methods:
- A placebo-controlled, double-blind trial randomized 72 adults with asthma to receive 500 mg natural vitamin E or placebo for 6 weeks.
- Inclusion criteria included established asthma, inhaled corticosteroid use, allergen sensitivity, and methacholine bronchial hyperresponsiveness.
Main Results:
- No significant difference in bronchial hyperresponsiveness (PD(20)) between vitamin E and placebo groups.
- Vitamin E supplementation showed no effect on other asthma control measures or serum immunoglobulin E levels.
Conclusions:
- Vitamin E supplementation provides no additional benefit to current standard treatments for mild to moderate asthma in adults.