Conclusions The concentrations of major inorganic elements in scalp hair showed an increasing trend up to 25 years of age, and a strong sex dependence of calcium and magnesium concentrations in the subjects older than 20 years.
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Age- and sex-dependence of five major elements in the development of human scalp hair.
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The sentences
The data suggest a slightly increasing trend in the male group, whereas the female grou p values remained nearly constant.