Could Long-Term Alimentary Iron Overload Have an Impact on the Parameters of Oxidative Stress?

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Abstract
The effects of long-term alimentary (drinking water) iron overload on the parameters of oxidative stress were evaluated. The study group (n = 35) from a village in southern Estonia was 37.1 ± 13.3 years old, and the mean period of drinking water iron overload was 20.6 ± 9.3 years. The serum iron content was significantly higher than normal. The total iron-binding capacity of serum tended to be lowered. There was no change in the transferrin content. The parameters of lipid peroxidation like conjugated dienes and thiobarbituric acid reactive substances showed also significant differences. In addition, the red blood cell glutathione content was also decreased. The total antioxidant capacity of serum was not changed. It can be concluded from our results that a long-term alimentary iron overload results in a positive serum iron balance, which, in turn, yields an increased oxidative stress.

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