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Animals that change color with the seasons mainly do so in response to daylight changes, but climate change is causing camouflage problems that may require evolutionary changes.

Permanent hair waving uses chemicals to create long-lasting curls.

Certain drugs can change hair color, either lightening or darkening it.

Increased Wnt signaling causes hair graying by depleting melanocyte stem cells in aged mice.

Scalp micropigmentation is a process where tiny dots of pigment are tattooed onto the scalp to create the appearance of a shaved head or fuller hair.

Functional materials in hair care improve shine, volume, frizz control, color protection, and repair.

Hair aging leads to color loss and reduced density, and dermatologists are key in treating it to improve quality of life.

A 76-year-old man's grey hair turned back to its original color after radiotherapy.

The created skin model with melanoblasts improves the study of skin color and offers an alternative to animal testing.

Minoxidil, a common hair treatment, may cause hair to turn grey or change color, especially with long-term use or if you have a family history of grey hair.

Melanocytes are important for normal body functions and have potential uses in regenerative medicine and disease treatment.

Isoliensinine, a natural compound, prevents stress-related hair greying by blocking a specific receptor on hair cells.

UV-A radiation significantly damages semi-permanent dyed hair.

The method greatly improves low-light sports images' quality and reduces artifacts.

Melanin in black hair protects it from sun damage better than light-brown hair.

Cosmetic treatments after chlorination damage hair more than treatments before.

BMP signaling affects hair color by interacting with the MC-1R pathway.

Angiotensin II is found at higher levels in black sheep skin and may influence coat color.

Eating phenylthiocarbamide made all the rats' hair go gray, but some returned to their original color after stopping.

Taking vitamin B6 corrected a pregnant woman's metabolic disorder, which changed her hair color.

Permanent eyebrow correction can improve quality of life for those with eyebrow loss.

The editor suggests removing "race" and "ethnicity" from dermatology and creating tools to objectively assess skin color and hair texture.

Stopping heptaminol medication reversed hair color loss in a patient on dialysis.

Swimming in pools with high copper can turn hair green, especially if hair is damaged.

Dye enters hair at the edges of cuticle cells and penetrates more from water than alcohol-based solutions.

Hair dyes vary in how long they last and how deeply they penetrate hair.

The document concludes that dermatology training and grading scales need to better represent dark-skinned individuals to improve diagnosis and assessment of skin conditions.

Pigmented concealing powders can improve the look of hair density for people with hair loss but need daily application and may not work well in wet conditions.