Variation of zinc concentration with the length of scalp hair in young adult women.

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  • HONGO Tetsuro
    Department of Human Ecology, School of Health Sciences, Faculty of Medicine, The University of Tokyo
  • SUZUKI Tsuguyoshi
    Department of Human Ecology, School of Health Sciences, Faculty of Medicine, The University of Tokyo
  • ISHIDA Hiromi
    Laboratory of Institutional Food Service, Kagawa Nutrition College
  • SUZUKI Hisano
    Laboratory of Institutional Food Service, Kagawa Nutrition College

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Other Title
  • 若年女子成人における毛髪中亜鉛濃度の頭皮直上からの長さによる変動
  • ジャクネン ジョシ セイジン ニ オケル モウハツチュウ アエン ノウド ノ

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Description

Hair samples cut close to the scalp were collected from 42 young adult women and the zinc concentrations in consecutive 1.5-cm sections from the proximal to the distal end of the hair were analyzed. Several subjects had remarkably elevated zinc concentrations in comparison with other subjects in proximal sections, irrespective of the fact that artificial hair-waving zinc concentrations increased with increasing distance from the scalp in some subjects. Zinc concentrations in two zinc pyrithione-containing cosmetics for hair washing were very high. From these results it was considered that artificial hair-waving produced only a minimal effect, if any, on zinc concentration in hair, and that variations of zinc concentration in hair from different individuals at different distances from the scalp would have resulted from absorption of zinc from cosmetics.

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