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Hair gets thinner, grayer, and changes texture with age due to genetics, environment, and cellular changes, affecting the growth cycle.

Ultraviolet rays damage hair, smoking may cause hair loss, and good nutrition is important for hair health, but genetics mainly decide hair thickness.

Researchers found that most genes affecting drug responses are not fully covered by commercial SNP chips, suggesting the need for more comprehensive tools to optimize drug selection based on genetics.

The document concludes that various childhood hair and nail disorders exist, some may improve on their own, and advances in genetics and immunology could enhance treatment and counseling.

Children's hair loss can be caused by many factors, including autoimmune diseases, emotional stress, genetics, and infections, with treatment and prognosis varying.

A model using hormone levels, cycle length, and BMI can help identify PCOS in Chinese women but isn't for screening teens.

Drug metabolism affects how long a drug works, its interactions, activation, and toxicity, and is influenced by genetics, diet, illness, and other drugs.

Midscalp hair density and terminal hair percentage are good indicators of female pattern hair loss severity.

UK medical students lack dermatology education, liver biopsy patients with risk factors show more fibrosis, and certain fungi resist drugs due to melanin; genetics may influence female hair loss.

Hair loss in African American women, caused by hair care, genetics, and environment, needs more research for better treatment.

Asian hair loss differs from Europeans; consider individual needs and psychological well-being for treatment.

Current treatments for male pattern baldness include minoxidil and finasteride, with new options being developed.

The study found that in Latin America, ancestry varies by location, influences physical traits, and affects how people perceive their own heritage.

Hair loss occurs due to fewer papillary cells, smaller follicles, and shorter growth phases.

Genetics and nutritional deficiencies are key factors in premature graying of hair.

Scientists found ways to identify and collect skin stem cells, which vary by skin area and are delicate.

The document concludes that mouse models are helpful but have limitations for skin wound healing research, and suggests using larger animals and genetically modified mice for better human application.

Lichen Planopilaris and Frontal Fibrosing Alopecia may help us understand hair follicle stem cell disorders and suggest new treatments.

Acne keloidalis nuchae is a tough-to-treat condition that greatly affects quality of life, especially in men of African descent.

Use "female pattern hair loss" term, assess androgen excess, treat with minoxidil and other medications if needed.

DHT's role in hair loss is important, but measuring its level for diagnosis is questionable.

Both genetic and lifestyle factors significantly affect female hair loss.

Adrenal gland disease is common in ferrets and causes hair loss and other symptoms.

Melasma's causes include genetics, sun exposure, hormones, and oxidative stress, and understanding these can help create better treatments.

Gray hair is caused by reduced melanin production or transfer issues, linked to aging and possibly health conditions, with treatments focusing on color camouflage.

Certain gene variations might be linked to severe acne in women but not in men.

The we/we wal/wal mice have defects in hair growth and skin layer formation, causing hair loss, useful for understanding alopecia.

Vitamin A may influence hair loss conditions like alopecia, but more research is needed to understand how.

The document provides a practical guide for diagnosing and treating various types of hair loss.

Acne is a common skin condition that can be influenced by diet, lifestyle, and hormones, and requires a treatment approach that includes psychological considerations.