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Human hair keratin genes have unique simple sequence repeats that may help track genetic variations.

Shorter GGC triplet repeats in the androgen receptor gene are linked to less hair loss in Han men.

Androgenetic alopecia is mainly caused by genetic factors and increased androgen activity, leading to hair follicle miniaturization.

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.

Alopecia areata is an autoimmune condition causing hair loss due to the immune system attacking hair follicles, often influenced by genetics and stress.

Hair follicle growth and fiber production in animals are influenced by chemical signals, proteins, pigmentation, genetics, and nutrients.

Women's hair generally gets thinner and less dense starting in their mid-thirties, with hair loss becoming more common as they age due to both genetics and environment.

Hair becomes gray and thin as we age, and while most hair loss in older people is due to genetics, there's a chance for gray hair to regain color under certain conditions.

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

Dietary essential fatty acids improved skin and hair conditions and partially corrected fat composition in diabetic mice.

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

Hair transplantation techniques have improved over 12 years, with follicular unit grafting providing more natural results and potential future advances in automation and genetics.

Over half of the children had abnormal hair under a microscope, with many having genetic hair conditions.

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

The document concludes that new treatments for hair loss may involve a combination of cosmetics, clinical methods, and genetic approaches.

Genetic differences in sheep affect wool type, with fat and immune genes influencing hair traits.

Aging causes hair to gray and thin, with the timing of graying varying by race, and factors like oxidative stress and genetics can lead to hair loss.

The conclusion is that many small genetic variations influence claw disorders in cows, and using genomic selection could help reduce these disorders.

Hair loss in women often doesn't follow a pattern, isn't linked to age, may be genetic, and can be related to thyroid issues or other health factors.

Permanent hair dye use may increase bladder cancer risk, especially in female smokers with certain genetic traits.

Men with high genetic risk for Polycystic Ovary Syndrome (PCOS) have increased chances of obesity, type 2 diabetes, heart disease, and hair loss, showing PCOS risk factors can affect both genders.

Hair loss without scarring is more common than permanent hair loss with scarring, and is often due to genetic factors.

Alopecia areata, a type of hair loss, may be passed through T cells and has genetic links, while treatments vary in effectiveness. Male pattern baldness can be treated with finasteride and is influenced by androgens in hair follicles.

Root hair growth is influenced by bacteria signals, cytoskeleton organization, and genetic factors.

Mouse melanocyte structure and function are influenced by genetics, hormones, and environmental factors.

Some people grow more hair on one side of their scalp, possibly due to genetics, behavior, or environment.

Early baldness in men may indicate risks for obesity, metabolic syndrome, insulin resistance, and heart disease, similar to women with PCOS. Alopecia areata is often linked with autoimmune diseases and mental health issues. Certain hair disorders are due to genetic issues, and chemotherapy can cause hair loss through specific biological pathways. Iron deficiency's link to hair loss is still disputed.

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.

The conclusion is that hair loss in women is caused by a mix of hormonal, environmental, and genetic factors, and treatments should target these various causes.

Nutrients and hormones affect root hair growth, but more research is needed to understand the genetic mechanisms.