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Older people's hair cuticles get more easily damaged and lose protective oils, especially in their 40s and 50s.

Frequent hairdryer use may worsen hair fragility in people with Pili Annulati.

Heat worsens damage in chemically treated hair, especially bleached and straightened hair.

Pili torti hair is fragile due to loose keratin filaments and weak disulfide bonds.

The study found that pili bifurcati causes hair to intermittently split into two branches, each with its own outer layer.

The study found that Short Anagen Syndrome results in short hair growth not due to hair fragility, and hair may grow longer after puberty.

The study found that hair fragility in Pili annulati may be caused by cavities and damage within the hair shafts.

Chemical treatments severely damage hair cuticles, especially in previously treated hair.

The research found that people's hair proteins vary, especially by ethnicity and body part, which could help identify individuals in forensic science.

The research found that people's hair proteins vary by individual and body part, with some differences between ethnic groups, which could help in forensics.

Some congenital hair disorders improve in childhood or with treatments like minoxidil and retinoids, while others like Netherton syndrome and trichothiodystrophy have a poor prognosis.

Some congenital hair disorders improve with age and can be managed with treatments like minoxidil, retinoids, supplements, and gentle hair care, but there's no cure.

Hair damage shows as fragility, dullness, and discoloration, varies by ethnicity, and is worsened by cosmetic procedures and diseases.

Mice with the naked gene have missing or abnormal hair cells.

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

Hair microscopy is useful for diagnosing certain hair loss conditions but has limitations and must be interpreted carefully.

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.

Dermatologists should use hair relaxers carefully to avoid hair and scalp damage, following specific guidelines for application and maintenance.

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

The conclusion is that new methods for isolating hair cuticle cells and removing the cuticle layer are effective and convenient.

Keratin 17 is crucial for early hair strength and cell survival.

Some mutant mice have hair with abnormal cross-linking, mainly in the cuticle, not affecting other hair parts.

The document concludes that a thorough history, physical exam, and specific tests are crucial for diagnosing and managing hair loss effectively.

Elkonyxis, a rare nail condition, improved when patients stopped their nail-picking habits.

The guide helps doctors diagnose hair problems by suggesting a thorough patient history, physical exams, and various diagnostic tools.

VEGF helps squamous cell carcinoma grow in ways beyond just blood vessel formation.

Microneedling can weaken hair in some AGA patients.

A genetic mutation in the LIPH gene causes tightly curled hair that stops growing in some Japanese individuals.

The research found two types of calcium in human hair, one that varies among individuals and another that is consistent across people.

Melanin density affects hair color, and this method can help in cosmetic assessments and diagnosing hair diseases.