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Sunlight damages hair, causing cuticle loss, protein changes, and discoloration.

The conclusion is that substances can penetrate hair fibers through multiple pathways, including both the cell membrane complex and the non-keratinous parts.

Lipids are crucial for healthy hair, protecting it from damage and breakage.

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

Heating human hair creates hollow microtubes with smooth surfaces.

Hair analysis can detect drug use but is costly and interpretation is complex.

Trichothiodystrophy hair is structurally abnormal with protein and organization issues.

The research found that twisting hair fibers can show changes in stiffness and damage, and help tell apart different hair treatments.

Keratinized wool cells still have some organelles like lysosomes and mitochondria.

X-ray microscopy can non-invasively show hair structure changes after treatments, but it's less detailed than TEM and needs improvement.

Hair straightening methods have advanced to improve effectiveness and reduce damage, but still rely on heat and chemicals.

Frequent blow-drying causes cracks and breakage in hair cuticles.

Researchers mapped and categorized specific keratin-associated protein genes on human chromosome 21q22.1.

Mammal hairs have different internal structures.

UV radiation damages hair by creating holes and peeling cuticle layers.

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

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

Defective mink guard hairs have split tips and missing cuticle cells, causing a metallic sheen.

Atomic Force Microscopy is a more accurate way to assess hair damage and the effect of cosmetic treatments.

Inhibiting ALOX12 can help hair cuticle maturation by increasing S100A3 citrullination.

Chemical hair straightening improves smoothness and shine but may cause side effects, suggesting a need for safer methods.

Red fox, golden jackal, and gray wolf hairs have similar features but differ in length, thickness, and inner structure.

Sunlight and chemical treatments change hair's internal structure differently, needing specific care.

Keratin fibrils in hair form and stop growing at specific points in the follicle.

Loose anagen hair syndrome is caused by structural abnormalities in the hair follicle's inner root sheath.

The G60S Connexin43 mutation causes hair growth issues and poor hair quality in mice, similar to human ODDD patients.

Corkscrew and cigarette-ash-shaped hairs in tinea capitis are caused by internal hair degradation and external resistance.

TRP-hair essence protects hair from heat damage, maintains color, and strengthens hair.

Hematin in shampoo helps repair and straighten damaged hair.

Hair straightening changes hair structure and can cause damage if done wrong, but improvements in the methods are expected to continue.