surface of the skin, hair, hair health, trichology, fat, dandruff of the hair, loss

surface skin hair health trichology fat dandruff loss formation fatty substance scalp structure rendering scalp hair skin dandruff fat reddened scaly crusts anatomy psoriasis greasy seborrhea dermatitis follicle hairline stump stem solid proteins keratin water lipids pigments melanin amino acids microscopic view loss fall disease thick thin smooth spotted curly glittering anagen catagen telogen root epidermis density enlargement healthy trichology shampoo conditioner wash rinse