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Yak belly hair has higher porosity and is less stiff than human hair, making it absorb dye better but less suitable as a direct substitute for hair dyeing.

Most young men with early gray hair have low vitamin D but normal iron levels.

Researchers identified potential markers for human hair color stem cells.

Men with less sun-sensitive skin have lower PSA levels, while men with more sun-sensitive skin have higher PSA levels.

Harlequin mutant mice have hair loss due to low AIF protein levels and retroviral element activity.

Silencing certain circadian clock genes increases skin pigmentation.

Clotrimazole, an antifungal cream, may safely reduce skin pigmentation by breaking down the enzyme needed for making melanin.

Finasteride reduces melanin production, possibly treating hyperpigmentation and melanoma, but needs more safety research.

Rice bran extract boosts melanin production in hair follicles.

The human scalp hair bulb contains different types of melanocytes with varying abilities to produce melanin.

Ruby laser pulses best destroy hair follicles during the growth phase and effectiveness varies with laser intensity; melanin is key for targeting, and timing treatments can improve results.

Genetics affect early female hair loss, severity depends on duration, and low ferritin levels not significant.

SCF and ET-1 together significantly increase skin pigmentation and melanin production.

ATP increases melanin production in skin after UV exposure, with the P2X7 receptor being crucial for this process.

HGF/SF increases skin melanocytes but doesn't change melanin type or amount.

Stressed fibroblasts greatly increase melanin production in hair, skin, and eye cells, mainly due to a growth factor called bFGF.

A substance called TCQA could potentially darken hair by activating certain genes and increasing melanin.

The study found that giant pandas have more melanin in black hair follicles than white, with gene expression differences that could affect hair color and skin health.

Hydrophilic melanin may help hair grow by improving blood flow and regeneration.

Dermal factors are crucial in regulating melanin production in skin.

Certain Chinese herbs, especially Cacumen platycladi, can promote hair regrowth and reduce hair loss-related hormone levels in mice.

The human scalp has different types of pigment cells in hair follicles with varying abilities to produce pigment.

Hair analysis can somewhat track past testosterone levels but is influenced by factors like hair washing, growth rate, sex, and hair color.

Redheaded people have higher levels of a vitamin D precursor, suggesting red hair may be an adaptation for better vitamin D synthesis in areas with less sunlight.

Females have higher estrogen receptor levels in hair than males, and these levels decrease in white hair compared to black hair.

A pregnant woman's skin condition improved after giving birth, possibly due to high estrogen levels during pregnancy.

Stress can worsen skin conditions by affecting hormone levels and immune response.

Hair analysis can't determine ponies' calcium and phosphorus levels; use soil and feed tests instead.

Certain gene variations and different levels of BDNF and CRH hormones are linked to vitiligo.

Kids with early graying hair often have low levels of calcium, ferritin, and vitamin D3.