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

Hair and nails are skin parts that develop early and serve protective and functional roles.

The document concludes that skin stem cells are important for hair growth and wound healing, and could be used in regenerative medicine.

Coumarin derivatives show promise as anti-estrogenic agents for treating breast cancer, with some in clinical trials.

Testosterone is important for men's sexual function, may help some women's sexual desire, while other hormones and neurotransmitters also play complex roles in sexual behavior.

Hair and nail cells share similar proteins, indicating a common differentiation pathway.

Regenerated fully functional hair follicles using stem cells, with potential for hair regrowth therapy.

Keratose, derived from human hair, is a non-toxic biomaterial good for tissue regeneration and integrates well with body tissues.

A mutation in the KRT75 gene causes frizzle feathers in chickens.

A cluster of sulfur-rich hair protein genes was found on chromosome 17.

Blocking Wnt signaling in young mice causes thymus shrinkage and cell loss, but recovery is possible when the block is removed.

Hair problems can be caused by genetics or the environment, and treatment should focus on the cause and reducing hair damage.

Hair treatments like bleaching increase friction by exposing tiny pores on the hair surface.

A certain surfactant sticks to human hair, making it change from water-repelling to water-attracting, which could help in hair conditioning.

The skin is the largest organ, protecting the body, regulating temperature, and producing hormones.

Trichoscopy is a useful tool for diagnosing hair disorders without pulling out hair.

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

Using neurohormones to control keratin can lead to new skin disease treatments.

Using certain small proteins with a growth factor and specific materials can increase the creation of neurons from stem cells.

Researchers found a new gene, hacl-1, that is active in mouse hair follicles during hair growth and may be important for hair biology.

Testosterone affects brain functions and contributes to sex differences, influencing conditions like autism.

The tropical legume Sesbania rostrata can form nodules in waterlogged conditions using a different method that involves plant hormones and specific genes.

Diagnosing hyperandrogenism in women is complex and requires accurate testing methods and consideration of SHBG levels.

Proper hair care can prevent and stop hair breakage in people with acquired trichorrhexis nodosa.

UV radiation damages hair by creating holes and peeling cuticle layers.

Hair absorbs molecules differently based on their size, charge, and love for water, and less at higher pH; this can help make better hair products.

Keratin injections can promote hair growth by affecting hair-forming cells and tissue development.

UVB radiation changes the chemical makeup and dries out human hair but doesn't alter its appearance or texture.

Shampoo B, which uses water-soluble silicone, is better at detangling hair in wet conditions due to its two-layer conditioning film.

The document explains what healthy skin, nails, and hair look like on an ultrasound.