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More research is needed to understand hair and scalp disorders in people with skin of color.

Caucasian women's hair appears thickest in their 20s, with perceived thinning after mid-30s due to both decreasing density and diameter.

Researchers found genes that control hair color and growth change before the visible coat color changes in snowshoe hares.

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.

Innovative cosmetics could safely change hair color by targeting biological hair pigmentation processes.

The document explains how hair is studied in forensics to identify its source and its role in criminal investigations.

The conclusion is that proper evaluation and treatment of hair loss in midlife women is important, considering the emotional impact and potential for various treatments.

Stress, nutritional issues, and chronic diseases can cause hair loss, and nail changes may signal internal diseases; treatment focuses on the underlying cause.

Melanin density affects hair color, and this method can help in cosmetic assessments and diagnosing hair diseases.

New cancer treatments are less harmful to hair but can still cause hair loss, color, shape, and growth changes.

Certain groups may need vitamin supplements to improve hair health and prevent other health problems.

Cancer treatments often cause hair disorders, significantly affecting patients' quality of life, and better management methods are needed.

miR-31 regulates hair growth by controlling gene expression in hair follicles.

Hair care products don't cause hair loss if used correctly.

A 10-year-old boy had the earliest reported case of hair that became progressively kinkier but eventually returned to normal on its own.

Most pregnant women experience skin darkening and hair changes, with these effects usually going away after giving birth.

As people age, their hair follicles produce less pigment, leading to gray and white hair, due to factors like reduced enzyme activity and damage to melanocyte DNA.

Hair greying is seen as a sign of aging; temporary fixes like hair dye are used, but a balanced diet and hair care can help manage it.

Not eating enough protein can cause hair roots to shrink and lose color, and hair to become thinner.

Some drugs can cause reversible hair loss, but certain chemotherapy drugs may lead to permanent hair loss; drugs can also change hair color and texture.

UVB radiation changes the chemical makeup and dries out human hair but doesn't alter its appearance or texture.

Lower pH straighteners change hair more but weaken it.

Hair can naturally regain color, and stress might influence greying and its reversal.

Gray hair regained color after thyroid hormone treatment.

Trichoscopy is useful for diagnosing and monitoring systemic lupus erythematosus, with certain hair and scalp changes indicating more active disease.

A Turkish family with sparse hair and eyebrow loss has a mutation in the U2HR gene linked to Marie Unna hereditary hypotrichosis.

Gamma rays did not change hair follicle density but increased white and hypopigmented hairs in mice.

Early recognition and management of skin side effects from new cancer therapies can prevent treatment delays.

Bimatoprost eye drops make rabbit eyelashes longer, thicker, and darker, and increase the number of lashes without causing inflammation.

Hair color and length affect metabolite profiles in hair, so they should be considered in hair analysis.