22 citations
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November 2010 in “Toxicological & Environmental Chemistry Reviews” In this study, higher concentrations of Pb, Cd, Cu, and Zn were found in the hair of smokers and users of hair dyes compared to non-smokers and those with undyed hair.
19 citations
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January 2003 in “Polish Journal of Environmental Studies” This study found that women who delivered children with locomotor system malformations had significantly higher lead concentrations in their blood and hair compared to those who had healthy children.
13 citations
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January 2015 in “International Journal of Trichology” This study found that cadmium levels were significantly higher in women with chronic telogen effluvium compared to healthy controls, suggesting cadmium toxicity might contribute to this hair shedding condition.
4 citations
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October 2022 in “Frontiers in public health” In this study on C57BL/6 mice, researchers found that cadmium chloride exposure led to metabolic disruption, accelerated skin aging, and impaired hair regeneration, with more severe effects observed at higher doses.
3 citations
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February 2016 in “Majallah-i dānishgāh-i ̒ulūm-i pizishkī-i Māzandarān/Journal of Mazandaran University of Medical Sciences” This study observed that noncertified Kohl used in Iranian cities contained heavy metals within WHO suggested limits, but highlighted concerns due to high levels in some samples.