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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.

The new method reliably identifies and measures different animal hair fibers in textiles.

Human hair keratin has a 40% α-helix structure that changes to a random coil in 8 M urea.

Mammalian hair scales change from smooth to wavy due to friction.

Nestin helps identify certain melanoma cells in nodular melanoma.

Dermoscopic examination helps diagnose different types of hair loss conditions by showing specific patterns.

Different hair fiber development might explain why hair loss severity varies in patients with a specific genetic mutation, and treatments that thicken hair could help.

Most children with alopecia areata have patchy hair loss and common trichoscopic features like yellow and black dots.

The research found specific proteins that affect fiber characteristics and hair growth in sheep and goats.

OCT can identify hair structures, but chemical treatments can damage them.

White and yellow dots indicate severe female hair loss in dark skin.

The study concluded that yellow dots are a common and useful sign for diagnosing alopecia areata in dark-skinned individuals and may indicate the severity of the condition.

L-phenylalanine and hydrolyzed eggwhite protein deeply penetrate human hair.

The research identified key molecules that help hair matrix and dermal papilla cells communicate and influence hair growth in cashmere goats.

Follicular atopic dermatitis in dark skin can look different, making diagnosis harder.

Trichotillomania shows specific signs like black dots and uneven hair lengths but lacks certain features of alopecia areata.

The study concluded that changing the culture conditions can cause sika deer skin cells to switch from a flat to a 3D pattern, which is important for creating hair follicles.

Nevus comedonicus is a rare skin condition with grouped open pores, sometimes linked to other body issues.

The study identifies the pheromone gland's location and structure in Endoclita vietnamensis, aiding future pest control methods.

Hair medullary cells in mammals vary in complexity, with humans having more structured cells similar to inner root sheath cells.

Cashmere goat hair growth follows a cycle with distinct growth, regression, and resting periods, influenced by specific genes.

The Doberman had multiple skin tumors, but it's unclear if color dilution increased the risk.

Removing MCPIP1 from myeloid cells in mice leads to hair loss and prevents skin tumors but causes pigmented spots.

The cell membrane complex in mammalian hair has three distinct types with different structures and chemical properties.

The RapidHIT ID system can effectively get DNA profiles from hair roots with enough cells.

Human hair cuticle has five cell layers with specific junctions and granules.

THH and PAD type III appear together early in hair growth, but deiminated THH appears later, suggesting another factor is involved.

Calcium signals and SHH guide the direction of feather growth in chicken skin.

The hair keratin variant is mostly found in Caucasians.