Abstract
This study deals with the variations in the levels of mercury in blood samples (Hg-B) from 6748 subjects (3343 men and 3405 women), living in two regions of France (Brittany, Atlantic coast and Lorraine, inland). The results reveal very slightly higher Hg-B levels in women (0.28 μg/dl vs 0.26 μg/dl in men; t-test p < 0.001). Slightly higher Hg-B levels according to age was noticed in adult males only. In boys (under 16), a clearcut higher Hg-B level (0.30 μg/dl) was observed compared with the older male group (0.26 μg/dl). In contrast, girls (under 16) showed a smaller geometric mean (0.23 μg/dl) than older women (0.28 μg/dl). No variation according to the consumption of alcohol and tobacco was established. Taking into account these interindividual variations, a geographic gradient of Hg-B has been observed, increasing from the inland population (0.23 μg/dl in men; 0.26μg/dl in women) to the coastal population of Brittany (0.34 μg/dl in men; 0.36 μg/dl in women).
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