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In order to emphasize the distribution of chemical elements (ChE) in biological environments, we determined hair and blood chemical concentrations in forty-seven male volunteers aged 19-23, who were divided into two groups: athlete and control. Atomic emission analysis showed stable deficiencies, which is commonly characteristic of northerners (I, Co, Mg, Se, Ca). More correlations existed in hair samples than in blood, which again proves that blood is a more dynamic environment of the body while hair is a better ...