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This study observed that long-term UV-A exposure and semi-permanent dye treatment can cause significant structural damage to human hair, particularly affecting the cuticle and cortex layers.

In this study, liposome-encapsulated thioglycolic acid improved hair perming by enhancing the penetration of perm solutions, resulting in a stronger S-shaped wave and higher cysteine content compared to the control.

This study found that microfibrils play a crucial role in shaping permanent waves by thioglycolic acid, and treating damaged hair with hydrolyzed keratin improved both waving efficiency and hair damage.

This review discusses the chemical processes involved in hair styling and straightening and reports no new results; the authors highlight pregnancy safety with hair treatments during pregnancy.

This study reports that prolonged UV irradiation causes progressive damage to the hair's keratin structure, leading to increased surface roughness, cuticle destruction, and decreased tensile strength in young women’s hair.

This study utilized a fluorescence probe to evaluate cysteine formation on hair fibers, finding that optimal fluorescence emission occurred at pH 4.5.

Hair coloring and bleaching can permanently break down hair protein and temporarily change its properties.

Certain skin drugs and topical agents, including some natural extracts and fragrances, can cause allergic reactions. Some hair dyes and extensions, as well as minoxidil, a hair growth treatment, can also cause allergies. Botulinum toxin A can effectively reduce sweat but may have temporary side effects.

The authors concluded that low energy laser therapy may serve as a useful complementary treatment for skin diseases such as lichen planus, infectious finger pulpits, scalp alopecia, and crural ulcers.

In this study, researchers found that follicular and epidermal transglutaminases are biochemically and immunologically distinct, suggesting the possibility of selectively modifying hair or epidermal proteins.

This study suggests that spiny keratoderma may be an ectopic hair formation on palms and soles, based on keratinization patterns observed using antikeratin antibodies and electron microscopy.

This case report identified UVB photosensitivity and testicular failure as previously unreported components of low-sulfur hair syndrome in a 16-year-old male.

This review discusses the mechanisms by which sunlight exposure aggravates hair aging and highlights the role of hair pigments in providing photochemical protection, reporting no new results.

This study reviewed 131 cases of White Piedra and found it predominantly affects young women, often asymptomatic, with the presence of hair nodules commonly linked to hair-related factors such as long hair and use of hair accessories.

This article reviews botulinum toxin use in men, focusing on anatomical and treatment differences, with no new clinical results.

This study identified the expression sites of five KAP5 genes on human chromosome 11q13.5 in scalp skin sections but did not explore their detailed distribution within hair follicles.

This study found that particle affinity was stronger on healthy hair compared to damaged hair, with the deposition influenced predominantly by hydrogen bonding and electrostatic attraction, while larger particles had poorer deposition.

This study reports that electrophoretic patterns of hair keratins are more similar among family members than unrelated individuals, potentially aiding genetic studies.

This study designed a novel model for 5a-reductase enzyme inhibitors using pharmacophore and 3D QSAR techniques, potentially allowing for improved prediction and development of drug therapies targeting benign prostatic hyperplasia.

In this study, researchers identified a three-step process underlying age-related curved hair from cyclical extension: surface lipid transfer, specific disulfide bond cleavage, and unraveling of α-helices into β-structures, which may inform care strategies to manage hair curvature.

A teenager's hair with alternating white and dark bands, known as Pili annulati, is a genetic condition that is usually harmless and often considered attractive.

This study found that the carbohydrate-based excipient β-cyclodextrin forms a stable inclusion complex with the active ingredient of Minoxicapil®, potentially enhancing its formulation for hair-loss treatment, and in vitro assays suggest improved proliferation of DPC cells, supporting its use in topical treatments.

This review re-examines hair blowouts as a material science process, where water acts as a plasticizer altering keratin's glass-transition temperature, allowing for temporary hair shaping through a moisture-induced matrix state change under heat and tension.

This study by Moore et al. (2025) provides the first evidence linking C-tactile afferents in humans to hair follicles, showing that these nerve fibers respond to hair movement rather than skin deformation, adding complexity to the understanding of their role in emotion and touch.

In this study, hair shafts from trichothiodystrophy patients with ERCC2 mutations revealed abnormal cuticle structures and protein imbalances compared to normal hair shafts.

This study assessed three materials—L-arginine, hydrolysed keratin, and cystine-silanol copolymer—ex vivo for their potential to reduce undesirable effects of hair bleaching, such as damage to hair proteins.

This article discusses a hypothetical model of androgenic hair trichophore composed of various chemical components, but it reports no new empirical findings; the authors emphasize the model's potential impact on hair cosmetics.

This study suggests that specific structural features of minoxidil analogs, such as hydrophobic and hydrogen bond field contributions, are key to enhancing lysyl hydroxylase inhibitory activity, which could inform future hair growth treatments.

Dermoscopy can help diagnose tinea capitis in children by looking for comma hairs, black dots, and broken hairs with white bands.

This review discusses strategies for treating hormone-dependent prostate diseases and synthesizes a range of potential 5α-reductase inhibitors, but experimental evaluation of these compounds was not completed.