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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.

Hair cuticles remain stable and resilient under stress due to strong protein content and crosslinking.

Hair form in mixed-blood families varies due to hereditary twist-knots and pigment formation.

The hair follicle structure is more complex than thought, with new findings on protein formation.

A Korean girl developed kinky hair without known cause or effective treatment.

Hair fiber shape and curvature are not significantly linked when ancestry is considered.

New mutations in hair keratin genes can change hair structure and cause monilethrix, with nail issues more common in certain gene mutations.

Human hair's structure and properties were studied using advanced microscopes and mechanical tests.

Metabolic disorders can cause hair structure defects and growth issues, but amino acid levels in hair remain normal.

Human hair's strength and flexibility vary by ethnicity, damage, and treatment.

The research identified genes that explain why some sheep have curly wool and others have straight wool.

External factors like certain shampoos, bacterial infections, and parasites might cause hair defects similar to genetic conditions.

A 2-year-old boy has a rare hair disorder causing brittle hair and hair loss, which may improve with age.

Chemical hair straightening changes hair proteins and mostly fixes broken bonds.

Cysteine strengthens hair, and glutamine fuels hair growth.

Monilethrix hair issues are due to problems in the hair's internodes.

Hair malformations may occur due to timing issues in hair development.

Friedreich's ataxia causes thin, weak hair with surface damage and cavities.

Humidity affects hair structure changes during stretching.

Grafted human scalp samples on mice can produce human hair, useful for studying hair genetics.

A new amino acid derivative, ATS, improves hair texture and moisture, making it easier to straighten curly hair.

Thorough hair examination is crucial for accurate diagnosis and treatment.

A 4-year-old girl had a rare hair disorder affecting only part of her scalp.

Lustre mutant sheep have normal hair structure and proteins but differ in felting properties.

The technique helps measure how hair styling ingredients affect hair's stiffness and flexibility.

Biotin improved hair appearance in uncombable hair syndrome but didn't change hair structure.