damaged and healthy hair under microscope. brown keratinous scaly structure with dermatitis and alopecia areata.

damaged hair healthy microscope brown dermatit alopecia head lice medical dandruff skin areata scaly fungus trichology root cuticle keratin care closeup structure illness loss micro frizzy cell growth bulb tissue surface wellness smooth protect melanin unhealthy shampoo close up brittle sunblock illustration treatment vector stem