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This study presents a method for directly measuring the solubility of solid chemicals in the skin's stratum corneum under various humidity conditions, emphasizing its importance for dermal drug delivery and chemical safety assessments.

Higher hair iron levels are linked to changes in brain structure and function.

In this study, maternal exposure to constant light significantly altered the neonatal skin structure in rabbits, associated with reduced maternal melatonin levels.

This study found that modern styling cosmetics can significantly alter hair structure through changes in interfacial chemistry and cohesion, particularly when applied to already damaged hair.

This study investigated the extracellular polysaccharides from the edible green alga Parachlorella sp. BX1.5, finding that they have potential applications in cosmetics and health products due to their stability, antioxidant properties, and effects on hair growth in mice.

This research studied European human hair, finding that cysteic acid and protein carbonylation increased with both chemical and photochemical oxidation. Protein carbonylation was highlighted as a more sensitive marker for photochemical oxidation, providing better in situ visualization of hair damage than cysteic acid.

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

In this review, the authors emphasize the importance of understanding drug chemical structures to help general physicians better manage and treat acne, although no specific results are reported.

This study found that shampoo and conditioner do not alter hair's molecular structure, while perming treatments significantly affect keratin and intermediate filament structures due to bond alterations.

This review synthesizes evidence on strategies to preserve donor aesthetics and reserve in follicular unit extraction, emphasizing conservative extraction limits and long-term planning to prevent donor site morbidity.

In this study, researchers developed vegan exosome-like vesicles from microalgae that mimic mammalian exosomes, demonstrating promising in vitro, ex vivo, and clinical effects such as improved wrinkle depth and elasticity, making them a potential alternative in cosmetic applications.

In this study using a virtual screening approach, eriocitrin and silymarin were identified as potent flavonoid compounds that strongly and stably interacted with 5α-reductase type II, suggesting potential development as novel treatments for androgenic alopecia.

This study found that thioglycolic acid molecules in hair treatments are primarily located in intrafibrillar unordered areas, where they redistribute disulfide bonds.

This study found that both Japanese male and female hair darkens with age, with significant sex differences in melanin composition and melanosome morphology influencing hair color.

This study examined the evolutionary and functional homology of steroid 5α-reductase and DET2 proteins, identifying protists as a common ancestor, and discovered a new subclass DET2-like in plants, potentially involved in polyprenol reduction.

In this cross-sectional study, social support was found to improve empowerment and alopecia-related quality of life in breast cancer patients, with an indirect benefit on quality of life achieved through enhanced empowerment.

This review explores the shared pathogenesis of alopecia areata and vitiligo and compares treatment responses, noting that hair regrowth in alopecia areata occurs more rapidly than skin re-pigmentation in vitiligo, possibly due to differences in stem cell biology and treatment effects on melanocytes.

This study suggests that using sebaceous glands from rat tail skin samples may effectively capture hair follicle stem cells, potentially aiding skin regenerative medicine when available tissue is limited.

This study describes GPRC5D's unique expression pattern in tissues that produce hard keratin, with retinoic acid inducing its expression in hair bulb cells and affecting keratin gene regulation.

This study explores how chromatin differences between dermal papilla cells and papillary fibroblasts contribute to hair follicle inductivity and investigates the regulatory changes in androgenic alopecia.

This study found that the S. epidermidis A/C lineage is more pathogenic due to its metabolic and genomic versatility, which allows it to adapt quickly from a commensal to a pathogenic lifestyle.

This study examined argan oil inclusion complexes with β-CD, finding that these complexes improve the antibacterial efficacy, uniformity, and mechanical performance of hair treatment formulations while enhancing the durability of bleached hair, suggesting their potential as stable and effective cosmetic ingredients.

This study found that hair follicles undergo significant molecular changes with age, notably a decline in keratins and keratin-associated proteins, which may contribute to age-related hair alterations.

This study found that manipulating prolactin levels in New Zealand Wiltshire sheep induces wool follicle growth cycles, revealing gene expression changes that suggest roles for specific genes in follicle function.

Hyaluronic acid microneedles help deliver minoxidil derivatives effectively for hair regrowth.

This study found that fibroblasts from mature skin showed significantly reduced mechanical force production compared to young skin fibroblasts, suggesting age-related changes in cellular mechanical properties.

This study found that the acidic hair straightening formulation at pH 1.0 improved hair alignments and straightening effectiveness more than pH 2.0, but it weakened fiber strength and affected hair color and composition.

This study found that augmenting or reducing allopregnanolone activity in the BNST affected contextual fear expression in rats, suggesting sex differences in anxiety may be linked to neuroactive steroid regulation.

This study found that early postnatal androgen activity affects the long-term expression of hormone receptors differently in female Wistar rats, influencing neural system programming during development.

This study found that JNK plays a dominant role in hair follicle matrix density-dependent proliferation and differentiation, suggesting that collagen bundling affects keratinocyte dynamics.