surface of the skin, hair, hair health, trichology, dandruff of the hair.

acids amino anagen anatomy bright brittle bulb catagen crusting curly dandruff density dermatitis elements epidermis fall follicle forelock hair health healthy illness keratin lipids loss magnification mane melanin microscope pigments protein psoriasis reddened root scalp scaly seborrhea seborrheic shiny skin smooth solid stem structure surface telogen thick thin trace trichology under water wavy