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Human hair keratin has a 40% α-helix structure that changes to a random coil in 8 M urea.

This article reviews the connection between malabsorption syndrome and skin diseases, reporting common skin complications and noting their improvement with malabsorption treatment; it offers no new clinical results.

This study found that taking oral FKH supplements for 90 days improved facial skin, hair, and nail appearance, and highlighted the role of free L-amino acids as potentially beneficial beyond their protein-building functions.

This review discusses the use of zebrafish larvae as an alternative model for studying ototoxicity, facilitating large-scale screening for otoprotective compounds, but reports no new clinical results.

This study found that patients with hidradenitis suppurativa had lower trabecular bone score and total hip bone mineral density compared to controls, with a high prevalence of vitamin D deficiency.

In this study on C57BL/6 mice, researchers found that cadmium chloride exposure led to metabolic disruption, accelerated skin aging, and impaired hair regeneration, with more severe effects observed at higher doses.

This study revealed that chronic restraint stress in mice led to significant alterations in metabolic pathways and gene expression associated with hair growth inhibition, using metabolomics and transcriptomics analyses.

This study found that hair treated with shampoo containing water-soluble silicone demonstrated smoother sliding and better detangling, compared to shampoo with water-insoluble silicone, due to differences in conditioning film formation.

This review discusses molecular signaling pathways and nutritional factors influencing feather growth and regeneration in poultry and offers no new results; the authors suggest these insights may guide strategies for producing superior plumage.

This case report details a 3-year-old girl with short anagen syndrome, characterized by short, sparse hair, where X-ray microanalysis showed her hair's main bioelements were normal.

This study observed that hair fibers in older women become more curved with age, decreasing hair luster due to their disordered alignment and structural differences between the convex and concave sides.

This case study describes a six-month-old boy diagnosed with Netherton syndrome, featuring ichthyosiform erythroderma and alopecia, possibly linked to aminoaciduria.

Hair fibers may have a unique, non-protein sheath not previously identified.

This study found that continuous extraction of crude casein with hot ethanol reduced its nutritive quality and growth rates in rats, although liver supplementation restored normal growth.

This study reports that using molecular docking methods, beta-sitosterol and stigmasterol from Serenoa repens were identified as potential natural inhibitors of the 5AR1 enzyme, which could serve as novel treatments for androgenetic alopecia based on their inhibitory action observed in a laboratory setting.

In this study, combined treatment with transglutaminase and keratin significantly repaired damaged hair by improving its structural properties, reducing swelling, and enhancing crosslink activities, as evidenced by microscopy and spectroscopy analyses.

This study found that increasing the pH from 2.0 to 6.0 enhanced the binding of cationic solutes to hair keratin, driven primarily by hydrophobic and electrostatic interactions.

This report suggests that correcting nutritional deficiencies may improve hair quality in patients with Monilethrix and similar hair shaft disorders, though it is not a cure.

This study suggests that 2% minoxidil and Kerium may promote hair regrowth in rats, while Aminexil showed the least effect among tested treatments; human-use products varied in efficacy in this animal model.

This study suggests that hair loss was a metabolic adaptation allowing hominids to evolve larger brains by alleviating dietary restrictions on essential amino acids for hair and brain development.

This study found that hair from ovarian teratomas shares similar chemical composition and morphology with scalp hair, but differs in physical properties and cysteic acid bands.

This study identified and sequenced a goat hair keratin cDNA that matches closely with its sheep counterpart, showing strong expression in hair follicle cortex.

In this study, formulations of a typical lotion shampoo with ethanol or propylene glycol increased the in-vitro release rate of zinc pyrithione, an anti-dandruff agent.

This review discusses the effects of chemical hair straighteners and reports associated side effects like scalp inflammation and hair damage, noting the variability of findings and the need for further research.

This paper describes the synthesis of (16S,20S)-3β-hydroxy-5α-pregnane-20,16-carbolactam from tigogenin without presenting new experimental results.

An elderly man's non-healing scalp lesion was successfully treated with a strong topical steroid.

This study identified genetic variations in the DSG4 gene among sheep, revealing valuable markers for assessing their impact on wool traits.

This study found that urokinase plasminogen activator (uPA) is elevated in hyperproliferative hair follicle keratinocytes in mice, and its inhibition significantly reduces their proliferation.

This study reported that 43% of Swiss men visiting a dermatologist experienced hair loss, and among those, 90% had androgenetic alopecia, with many switching treatments to finasteride.

This article reviews the need for multicenter clinical trials to establish reference data for ultrasound screening protocols for Down syndrome and reports no new findings.