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[DOI] [PMC free article] [PubMed] [Google Scholar] 54.Soliman H, Theret M, Scott W, Hill L, Underhill TM, Hinz B, Rossi FMV

The hair shaft itself consists of three concentric layers: The cuticle , a protective outer layer formed of overlapping scales similar to roof tiles The cortex , the intermediate layer containing melanin responsible for hair colour The medulla , a central core present in particularly thick hairs This layered structure explains why your hair can appear shiny or dull: when the cuticle scales are smooth and aligned, they reflect light harmoniously, creating that sought-after shine

Actors use Botox and hair plugs to stay camera-ready

Cancer 133 UekiT.FujimotoJ.SuzukiT.YamamotoH.OkamotoE

[DOI] [PubMed] [Google Scholar] 217.Yao J., Li X., Lin M., Han Z., Wang X., Guo J., Wu B., Xia J