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This study discusses how hair characteristics, such as color, thickness, and volume, change with age and hormonal factors, affecting perceived age, and introduces concepts of hair aging and the nuanced diagnosis between androgenic and senile alopecia.

This study observed that physical examinations of hair and scalp changes, such as texture and color alteration, can help predict zinc deficiency severity among children with hair abnormalities.

In this study, researchers used computer-generated models to demonstrate that subtle changes in hair diameter, density, and style significantly affect perceptions of age, health, and attractiveness.

This study found that repeated exposure to ozonated water caused oxidative changes in hair proteins, lipids, and pigments, leading to altered hair properties, with minimal effects on shine and color.

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.

Hair care products clean, protect, style, color, and change hair structure.

This study found that metabolite levels in hair samples differ significantly by hair color and segment, leading to recommendations for best practices in hair metabolomic studies.

This study found that in lactating Holstein cows, hair from the tail switch, which grows faster and is more sensitive to cortisol changes, is ideal for measuring hair cortisol levels.

This study observed that black-haired areas in female Saluki puppies developed hypotrichosis, with dilated hair follicles containing melanin clumps, while white-haired areas remained normal.

This study suggests that gamma-ray irradiation affects hair follicle density, structure, and pigmentation in mice, with some changes observed in later hair cycles.

In this study, most participants began using chemical hair dyes at a young age, experiencing adverse effects, but continued due to the perceived importance of hair color.

This study found that some white or grey human hairs can naturally regain pigmentation, suggesting a potential temporary reversibility of hair greying associated with stress and molecular changes.

This study found that hair dyed with anionic basic hair dye lost more color after shampooing compared to cationic and nonionic dyes, with alkaline shampoo increasing this effect.

This case report describes a 56-year-old male with chronic watery diarrhea, hyperpigmentation, and alopecia, in whom colonoscopy revealed multiple polypoidal lesions from the distal transverse colon to the rectum.

This study found that melatonin implants caused male weasels to molt, develop a new white winter coat, and become reproductively inactive, suggesting melatonin affects their neuroendocrine system.

This article discusses various hair and nail abnormalities linked to paraneoplastic conditions and cancer treatments, emphasizing their potential role in diagnosing and managing internal malignancies and reports no new clinical findings.

In this study, researchers identified a gene expression pre-pattern and implicated the Wnt inhibitor Dickkopf 4 in the formation of color patterns in domestic cat embryos.

This study reviews how different hair dyeing methods affect hair structure, showing oxidative dyes cause more structural damage than semi-permanent dyes, while new technologies aim to minimize harm while preserving color.

This review explores the possibility of using the side effects of chemotherapeutic agents for regenerating hair follicles, potentially offering a new treatment avenue for different types of alopecia.

This study reviews drug-induced hair changes, noting that hair loss often reverses after stopping the drug, but permanent alopecia cases post-chemotherapy are rising.

This chapter reviews the formation of natural hair color, strategies for artificial coloring, and future trends, without presenting new research findings.

The abstract does not provide any research findings or conclusions to summarize, focusing instead on color and logo specifications.

In this study, lipo-minoxidil was found to increase vascular endothelial growth factor expression in the skin of C57BL/6 mice more than standard minoxidil formulations.

This case report described how peripheral nerve stimulation provided significant pain relief and reversal of dermatological symptoms for a female patient with complex regional pain syndrome after conventional treatments failed.

This study found that transparent shampoo bars containing high concentrations of aloe vera gel, castor oil, and cinnamon oil exhibited antimicrobial activity, reduced hair loss, and caused no skin irritation.

In this case study, a large colonic lipoma led to colo-colonic intussusception requiring surgical intervention in a 74-year-old man.

This study used transcriptome analysis to explore the genetic mechanisms behind the development and seasonal variation of nuptial pads in R. chensinensis, identifying key genes and processes that suggest the pads' development involves complex regulatory pathways, particularly those related to cell cycle and hormone synthesis.

This article reviews practical approaches for managing dermatologic conditions in patients with skin of color and reports no new clinical findings.

This study found that stress-induced inactivation of the enzyme Dicer in melanocytes can cause premature hair greying by preventing proper melanocyte placement and melanin transfer in mice, suggesting the Dicer-miR92b-ItgaV pathway as an important link between stress and grey hair.

This study suggests that in gp91phox-knockout mice, tranexamic acid administration led to brown hair by increasing MGRN1 and collagen XVII levels, while the retention of black hair appears to rely on the gp91phox/ROS/IL-1β/TGF-β pathway.