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Certain chemicals cause hair graying in black mice but not yellow mice.

A woman's cyclic Cushing syndrome was caused by a tumor in her adrenal gland that produced ACTH.

The girl's regrown brown hair had less of certain pigments than her original black hair.

Darker hair in guinea pigs holds more codeine than lighter hair.

Hormone imbalances can cause specific skin changes, which may help in early detection of endocrine disorders.

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

Barn owls with smaller black spots have higher testosterone levels, which might be due to genetic effects on hormone regulation rather than hormone effects on coloration.

The document concludes that MGRN1 affects mouse fur color by interfering with a receptor's signaling, but its full role in the body is still unknown.

Sox2 controls hair color by affecting pigment production in hair follicles.

Human hair varies widely and should be classified by curl type rather than race.

Gray hair is caused by reduced melanin production or transfer issues, linked to aging and possibly health conditions, with treatments focusing on color camouflage.

Cirsium japonicum flower extract increases melanin production and could help treat depigmentation conditions.

Hair color is not a risk factor for developing alopecia areata.

Hair analysis can detect drug use but is costly and interpretation is complex.

Physical exams are important in hair loss diagnosis, considering cosmetic history, systemic diseases, and classifying alopecia types.

Minoxidil helps lower severe blood pressure and promotes hair growth but can have serious side effects and must be used continuously.

The gene Endothelin 3 makes mice's fur darker by increasing pigment cells and pigment levels.

Laser treatment can inhibit hair growth and different hair colors reach different temperatures when lasered.

Melanin may help melanoma cells grow by aiding their metabolism.

Rat whisker cells can help turn other cells into nerve cells and might be used to treat brain injuries or diseases.

Low-dose oral minoxidil can be effective for hair loss but should be avoided in people with certain heart conditions and severe liver problems.

Radiotherapy can cause rare changes in hair color, which should be discussed with patients.

The woman's rare combination of diseases suggests an unknown factor may predispose individuals to multiple endocrine diseases.

The document concludes that hair is complex, with a detailed growth cycle, structure, and clinical importance, affecting various scientific and medical fields.

Mannosylerythritol lipids are good for skin and hair care products.

Blocking BACE1 and BACE2 enzymes causes hair color loss in mice.

Black women's unique hair characteristics and styling practices can lead to specific scalp conditions, which require early diagnosis and appropriate treatment.

MEL-A from soybean oil can boost fibroblast and papilla cells, potentially aiding hair growth.

Hair sunscreens are important for maintaining hair's cosmetic value.

Ruby laser hair removal significantly reduces hair density.