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  2. Human hair color - Wikipedia

    en.wikipedia.org/wiki/Human_hair_color

    All pigments wash out of the cuticle. Natural color stays in much longer and artificial will fade the fastest (depending on the color molecules and the form of the dye pigments). Permanent hair color gives the most flexibility because it can make hair lighter or darker as well as changing tone and color, but there are negatives.

  3. Hair coloring - Wikipedia

    en.wikipedia.org/wiki/Hair_coloring

    A woman with dyed pink hair. Hair coloring, or hair dyeing, is the practice of changing the color of the hair on humans' heads.The main reasons for this are cosmetic: to cover gray or white hair, to alter hair to create a specific look, to change a color to suit preference or to restore the original hair color after it has been discolored by hairdressing processes or sun bleaching.

  4. A Study Says Gray Hair May Be Reversible - AOL

    www.aol.com/lifestyle/study-says-gray-hair-may...

    The differing compartments allow the McSCs to mature and pick up the protein that can regenerate into pigment cells and continually color hair as it grows. These McSCs shift back and forth between ...

  5. Melanin - Wikipedia

    en.wikipedia.org/wiki/Melanin

    In humans, melanin is the primary determinant of skin color. It is also found in hair, the pigmented tissue underlying the iris of the eye, and the stria vascularis of the inner ear. In the brain, tissues with melanin include the medulla and pigment-bearing neurons within areas of the brainstem, such as the locus coeruleus.

  6. Promising New Study Says Gray Hair May Be Reversible - AOL

    www.aol.com/lifestyle/could-gray-hair-reversible...

    The reason for hair turning gray may have to do with stem cells and hair follicles, a new study finds. Here, experts if gray hair could be reversible. Promising New Study Says Gray Hair May Be ...

  7. Cortex (hair) - Wikipedia

    en.wikipedia.org/wiki/Cortex_(hair)

    Anatomy of hair. The cortex of the hair shaft is located between the hair cuticle and medulla and is the thickest hair layer. It contains most of the hair's pigment, giving the hair its color. The major pigment in the cortex is melanin, which is also found in skin. The distribution of this pigment varies from animal to animal and person to person.

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