concept hair biology, structural components, microscopic elegance keratin wonders unveiled

keratin hair nails skin protein structure cells follicles growth strength elasticity beauty care treatment products natural health maintenance regeneration repair keratinocytes amino acids bonds cuticle cortex medulla keratosis keratinization keratolytic keratoplasty pilaris keratinous keratinized keratinocyte differentiation proliferation migration apoptosis adhesion markers factor culture cell line stem receptor microscopic aigenerated