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

Topical finasteride might help with male hair loss with fewer side effects than pills, but more research is needed.

The trichoscopy-assisted hair pull test is useful for diagnosing different types of hair loss.

A 13-year-old boy had a rare, stable type of hair loss with little chance of regrowth, but treatment is available for looks.

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.

Different scalp and hair disorders are more common in certain ethnic groups, with the most common being androgenetic alopecia, which is treated with medications like minoxidil and finasteride.

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

Women's hair gets thinner and grayer as they age, with treatments available for hair loss and graying.

Some chemicals can permanently or temporarily remove color from skin and hair, which can be distressing and is not well-regulated in cosmetics.

Ziehl-Neelsen's stain helps identify different parts of hair in sheep and goats.

Dermal stem cells help regenerate hair follicles and heal skin wounds.

Oxidative stress damages hair and contributes to aging, and managing it can help maintain hair health.

The document concludes that understanding and treating hair loss requires recognizing its various types and using appropriate diagnostic tools and treatments.

Explosions don't stop hair proteins from being used to identify people.

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

Essential oils from Chamaecyparis obtusa may help hair grow by increasing a growth-related gene.

Diazoxide applied to the skin can increase hair growth without harmful side effects.

Diffuse alopecia areata involves more inflammation and higher allergy-related antibodies than patchy types.

X-ray microbeams can mimic cosmic rays' effects on tissue, aiding wound healing and hair growth.

Gray hair may be caused by lower antioxidant activity in hair cells.

Hair color is determined by melanin produced and transferred in hair follicles.

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 follicle melanocytes die during hair regression.

Chemotherapy damages hair follicles, causing hair loss and other cellular changes.

Mutations in the hairless gene in mice affect its expression and lead to a range of developmental issues in multiple tissues.

Hair loss in males involves inflammation, collagen buildup, and follicle damage, with severity increasing with age and baldness duration.

Tofacitinib temporarily regrew hair in a man with alopecia, but its effects didn't last.

Using minoxidil on balding men's scalps can increase hair growth, according to a 12-month study.

Depigmented hair regrowth after alopecia areata can be permanent.

The laser effectively removes hair for skin types IV and V but is less effective for type VI.