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Gray hair has more continuous medullation and a higher medullary diameter than black hair.

Children's hair grows in different types from before birth through puberty, with growth rates and characteristics varying by age, sex, and race.

Prenatally androgenized ewes can model increased hair diameter in women with PCOS.

Hair analysis for drugs needs a better understanding of how drugs enter hair, considering factors like hair structure and pigmentation.

Minoxidil causes excessive hair growth in almost all patients.

Scientists made antibodies to tell cashmere and wool apart, which could improve how we identify animal fibers.

Researchers found new hair and nail genes, how hair reacts to UV, differences in white and pigmented hair growth, nerve changes in alopecia, treatments for baldness and alopecia, a toenail condition linked to a genetic disorder, and that nail fungus is more common in people with psoriasis.

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

Androgens can both increase and decrease hair growth in different parts of the body.

Hormone treatments in transsexual individuals reduce hair growth and oil production in male-to-females and increase them in female-to-males.

Androgens can cause hair growth in some areas and hair loss on the scalp.

Oxidative stress contributes to hair graying and loss as we age.

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

Hair ages due to genetics and environmental factors, leading to graying and thinning, with treatments available for some conditions.

Wool follicles are complex, involving interactions between different cell types and structures.

Human beard hair medulla contains a unique and complex mix of keratins not found in other human tissues.

Minoxidil helps hair regrowth in alopecia patients, with 16 having good results and no side effects.

Japanese women typically start experiencing hair loss after 40, with reduced hair density and thickness being the main factors.

Male hormones are important for hair and oil gland development and can cause conditions like excessive hair growth and acne.

Androgens like testosterone affect hair growth and oil production differently across body parts and individuals.

The document explains hair growth and shedding, factors affecting it, and methods to evaluate hair loss, emphasizing the importance of skin biopsy for diagnosis.

Hair diversity is influenced by complex genetics and environmental factors, requiring more research for practical solutions.

Premature graying of hair may suggest health issues and currently lacks effective treatments.

White hair grows thicker and faster than black hair due to higher activity of growth-related genes and proteins.

Feed restriction in sheep leads to finer wool fibers but may reduce wool quality.

Different populations have distinct hair structures related to their ancestry.

South American camelids should be sheared early, fleece type affects fiber quality, and the S/P follicle ratio doesn't distinguish between Bolivian llama genotypes.

Woman has discoid lupus, frontal fibrosing, and androgenetic alopecia.

Finasteride reverses early hair loss and promotes growth.

Bimatoprost ophthalmic solution 0.03% safely and effectively increases eyelash growth when applied to the upper eyelid.