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Zebrafish skin regeneration relies on cell behaviors and reactive oxygen species, with antioxidants reducing and hydrogen peroxide increasing regeneration.

Feather pigment patterns form through melanocyte arrangement and simple regulatory mechanisms.

Gray hair can potentially be reversed, leading to new treatments.

Tandem repeats significantly influence hair color, especially darker shades, across different ancestries.

A blue Staffordshire Bull Terrier had hair loss due to color dilution alopecia, confirmed by tests, but no treatment was pursued.

Hair ages by graying and thinning, treatable with medications, transplants, or hair dye.

Anthocyanins from fruits and vegetables may help prevent and treat colorectal cancer safely.

A 32-year-old man with early graying hair shows a unique pattern, suggesting more research is needed on why hair grays early.

Minoxidil lotion can cause hair discoloration.

Certain flavonoids can improve the growth of pigmented hair in mice.

Ketoconazole shampoo can cause rare pink hair discoloration.

BMP4 helps stem cells turn into pigment-producing cells, affecting hair color and growth.

Premature graying in young children can affect self-esteem, and addressing underlying health issues may reverse it.

TRH in hair follicles can influence hair color by increasing melanin.

Female goslings have darker feathers than males due to more melanin.

Tattooing guidelines focus on safety, hygiene, and following rules.

Malnutrition can change hair color due to altered copper and zinc levels.

Hair style affects perceptions of age, health, and attractiveness more than hair color does.

Hair dyes penetrate the scalp very minimally, less than 1%.

Stress causes hair graying by overactivating nerves that deplete color-giving stem cells.

Chemical treatments change hair surface properties, making it more hydrophilic and able to bind conditioners.

Hair graying may help prevent cancer by protecting stem cells.

1,25-dihydroxyvitamin D3 helps melanocyte precursors from hair follicles grow and produce melanin, aiding vitiligo treatment understanding.

Normal cells stain well with fluorescent globulin, but tumor cells do not.

Using radiation to make mice's hair turn gray helps study and find ways to prevent or reverse hair graying.

Tattoo markers help place ear prostheses easily and improve acceptance.

Recombinant human hair keratin proteins can effectively stop bleeding.

Human skin and hair color variation is mainly due to melanin produced by a few genes, with melanin protecting against sun damage.