March 1963 in “Sangyo Igaku” Women generally have higher levels of iron, copper, and zinc in their hair than men, with differences increasing with age.
January 2006 in “Heilongjiang yiyao kexue” This study found that children with repetitive respiratory tract infections had significantly lower levels of the trace elements zinc, iron, and copper in their hair compared to healthy children.
March 2024 in “Indian Journal of Dermatology” In this observational study, researchers found that women with telogen effluvium who had higher baseline ferritin levels or received higher doses and longer durations of iron supplementation reported greater satisfaction, suggesting that iron supplementation can improve patient satisfaction regardless of initial ferritin levels.
January 2011 in “Nuclear Techniques” This study found that lead accumulated in the hair shafts of individuals exposed to mining environments, while iron, copper, and zinc levels remained stable, highlighting the significance of SRXRF micro-analysis for environmental health research.
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January 2016 in “Hair therapy & transplantation” This study reported significantly lower levels of serum iron, ferritin, and calcium in young patients with premature gray hair compared to controls, implying that supplementation might prevent further graying.