Related Experiment Videos
Human biochemical response to ozone and vitamin E.
Journal of Toxicology and Environmental Health
|November 1, 1979
Summary
Vitamin E supplementation did not protect healthy adults from the blood biochemical effects of ozone (O3) exposure. This study found no added benefit of vitamin E against air pollution-induced oxidative stress.
Area of Science:
- Environmental Health
- Nutritional Biochemistry
- Toxicology
Background:
- Community air pollution poses health risks due to inhaled oxidants like ozone (O3).
- Vitamin E (dl-alpha-tocopherol) is an antioxidant, prompting investigation into its protective potential against environmental toxins.
Purpose of the Study:
- To evaluate the efficacy of vitamin E supplementation in protecting against the adverse biochemical effects of ozone exposure in healthy adults.
Main Methods:
- Healthy volunteers received 800 or 1600 IU of vitamin E or placebo for at least 9 weeks under double-blind conditions.
- Participants underwent controlled ozone exposure (0.5 ppm for 2 hours).
- Biochemical markers including red blood cell fragility, hematocrit, hemoglobin, glutathione concentration, and specific enzyme activities were assessed.
Main Results:
- No significant differences were observed in any measured biochemical parameters between vitamin E-supplemented groups and placebo groups following ozone exposure.
- Vitamin E supplementation did not alter the blood's response to controlled ozone exposure.
Conclusions:
- Vitamin E supplementation, at the dosages and duration used in this study, does not provide additional protection against the blood biochemical effects of ozone exposure in healthy, exercising adults.
- These findings suggest limited benefit of vitamin E for mitigating acute oxidative stress from simulated summer air pollution episodes.