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This study found that melanin granules in black human hair are key dyeing regions for oxidative hair coloring, as confirmed by nanoscale mass spectrometry analysis detecting deuterium ions.

This study used nanoscale secondary ion mass spectrometry to locate where calcium and copper are concentrated in colored hair, finding these metals particularly in the cuticle's sulfur-rich regions.

This study investigates calcium and phosphorus accumulations in the hair of mummies from the Taklamakan desert and debates their exogenous or endogenous origin.

This study found that various plant oils can penetrate the lipid-rich cell membrane complex of hair, improving its fatigue strength by preventing flaw propagation, with greater penetration observed for oils containing shorter chain lengths and unsaturated fatty acids.