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Hair's internal fibers are arranged in a pattern that doesn't let much water in, and treatments like oils and heat change how much water hair can absorb.

Mutations in the PADI3 gene are linked to a higher risk of scarring hair loss in women of African descent.

Cysteine-rich keratins evolved independently in mammals, reptiles, and birds for hard skin structures like hair, claws, and feathers.

Keratin hydrogels from human hair show promise for tissue engineering and regenerative medicine.

Human hair has a new region with ordered filaments and the cuticle contains β-keratin sheets.

Disulfide bonds in keratin fibers break more easily under stress, especially when wet, affecting fiber strength.

Recombinant keratin K31 makes damaged hair thicker, stronger, and straighter.

The document concludes that understanding hair's composition and the effects of treatments can lead to better hair care products.

A new keratin, hK6irs1, is found in all layers of the hair follicle's inner root sheath.

Changes in keratin make hair follicles stiffer.

Antler velvet hair and body hair of red deer have different structures that help with protection and insulation.

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

Prolactin may play a significant role in skin and hair health and could be a target for treating skin and hair disorders.

The document explains how to identify different hair problems using a microscope.

Two specific hair keratin genes are active during hair growth and decline as hair transitions to rest.

Hair in mammals likely evolved from glandular structures, not scales.

Yak belly hair has higher porosity and is less stiff than human hair, making it absorb dye better but less suitable as a direct substitute for hair dyeing.

The model helps understand how wool fiber structure affects its strength and flexibility.

Understanding normal hair growth and loss in children is key to diagnosing and treating hair disorders.

Human hair follicle organ culture is a useful model for hair research with potential for studying hair biology and testing treatments.

The article explains the genetic causes and symptoms of various hair disorders and highlights the need for more research to find treatments.

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

The document concludes that early diagnosis and treatment are crucial for children with hair loss to prevent permanent damage, although not all conditions can be effectively treated.

Cats with abnormal hair had DSG4 gene changes causing hair problems.

Neurohormones help control skin health and could treat skin disorders.

TGM3 is important for skin and hair structure and may help diagnose cancer.

Hair fiber research combines multiple sciences to improve hair care products.

Nanomaterials can improve hair care products and treatments, including hair loss and alopecia, by enhancing stability and safety, and allowing controlled release of compounds, but their safety in cosmetics needs more understanding.

Smad4 is important for healthy hair follicles because it helps produce a protein needed for hair to stick together and grow.

A second domain of high sulfur KAP genes on chromosome 21q23 is crucial for hair structure.