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

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

Hair loss in Androgenetic alopecia (AGA) is due to altered cell sensitivity to hormones, not increased hormone levels. Hair growth periods shorten over time, causing hair to become thinner and shorter. This is linked to miscommunication between cell pathways in hair follicles. There's also a change in gene expression related to blood vessels and cell growth in balding hair follicles. The exact molecular causes of AGA are still unclear.

Hair type differences in cashmere goats are linked to keratin and cytoskeletal organization.

Hair loss can be caused by cancer, treatments, or skin conditions, and trichoscopy helps diagnose it.

Hormones cause hair loss by affecting cell growth and weakening cell attraction.

A gene mutation in mice causes increased mast cells and disorganized hair follicles in their skin.

The document corrects details about examining hair from patients with a hair loss condition called Telogen Effluvium.

Common types of non-scarring hair loss have various causes and treatments, but more effective solutions are needed.

Syphilitic alopecia can look like alopecia areata, so careful diagnosis is important.

Hair disorders can be genetic or acquired, affecting hair growth and loss differently.

KIF18B is important for correctly positioning cell division machinery in skin cells, affecting hair follicle development.

FAPD is a possible diagnosis for hair loss in patients of color and requires multiple evaluations for accurate diagnosis.

Scientists found gene mutations that affect hair loss, skin stem cells, and skin disorders, and identified drugs that may help treat blood vessel and skin conditions.

Abnormal cuticle and hair shaft medulla cause hair loss in androgenetic alopecia; sonography helps diagnose and manage it.

Hair changes could indicate neurological diseases and help monitor treatment.

A man with hair loss developed a condition causing scarring and inflammation in both bald and non-bald areas of his scalp.

A coordinated approach combining medical, trichological, and visual support is needed to better manage hair loss.

Miniaturized hairs stay connected to muscle in alopecia areata, allowing possible regrowth, but not in androgenetic alopecia.

Pigmented casts are common in several hair loss conditions and can help diagnose specific types of alopecia.

Trichoscopy helps tell apart Frontal Fibrosing Alopecia and Lichen planopilaris by showing different hair and scalp features.

Loose anagen hair syndrome may be caused by keratin gene mutations.

Recognizing eyebrow hair loss linked to a rare skin condition is crucial for proper treatment.

Hair fibers break by cuticle cell slipping, shape changing, cuticle fraying, and surface cracking when stretched under specific conditions.

The document concludes that doctors should recognize congenital triangular alopecia to avoid unnecessary treatments, as it does not respond to steroids like alopecia areata does.

Overexpression of certain genes can shorten hair by disrupting the hair-growth cycle.

Deleting part of a gene in mice causes wavy hair and high pup loss.

Certain types of human hair might help ultraviolet rays reach and damage cells, possibly leading to melanoma.