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This study observed that tooth loss in mice led to premature graying of hair in the interbrow region, which was possibly due to reduced stimulation of the trigeminal nerve, suggesting that decreased mastication could cause this type of hair graying.

This case study describes an elderly woman with distinctive black hair patches and scalp pigmentation, but it does not provide a diagnosis or new findings.

This study found that gene expression changes in hair bulb cells are linked to graying hair, affecting processes like melanogenesis and cell-cell interaction.

This case study highlights that even professional eyebrow tinting can lead to chemical burns, and increasing consumer awareness is crucial as its popularity grows and unregulated products become more common.

This study found that dual inhibition of BACE1 and BACE2 in mice affects melanosome maturation and causes dose-dependent hair depigmentation without altering retinal morphology.

This study observed that TBX3 mRNA expression levels were region-specific and correlated with pigmentation patterns in dun Mongolian horses, providing insights into the genetic mechanisms behind their distinctive Bider markings.

This study suggests that the patchy thickening and reddish discoloration in rabbit skin during the hair cycle may be due to large anagen-phase hair follicles compressing the dermis and increased blood vessels causing redness.

This paper reviews recent research on hair graying, suggesting that an imbalance in oxidative stress handling may affect melanocyte stem cells and melanin production with age, and calls for exploring strategies to prolong melanin production.

This review discusses the development, regulation, and aging of the human hair follicle pigmentary system and suggests potential for reversing hair graying by manipulating follicle melanocytes in vitro, but reports no clinical results.

This study found that sunlight exposure causes significant structural and chemical damage to hair, including cuticle loss, cortex damage, and discoloration, with water playing a major role in discoloration of brown hair.

This study found that hair follicle melanocytes show increased age-related susceptibility to oxidative stress compared to epidermal melanocytes, which may contribute to the graying of hair.

This article discusses a case of sudden hair whitening in an 82-year-old woman, exploring the 'overnight greying' phenomenon, and reports no new results.

This study by Pérez-Oliva et al. explored how Mahogunin Ring Finger-1 (MGRN1) affects melanocortin-1 receptor (MC1R) signaling, suggesting that MGRN1 competitively inhibits Gαs binding to MC1R, influencing pigment production.

In this study, 7-10-year-old Polish children showed a significant increase in skin pigmentation levels, with girls exhibiting this change more prominently than boys, suggesting an early sign of puberty.

In this case report, an 80-year-old woman experienced darkening of previously grey hair, which may be linked to vitamin B supplementation, though its effectiveness is typically associated with reversing greying only in the presence of an initial vitamin B deficiency.

This study found that differences in skin transcriptomes between juvenile and adult mink, as well as between black and white mink, suggest genes regulating hair color are active during early development rather than adulthood.

This study researched the dun coat color in Mongolian horses, finding that variations in TBX3 expression in different skin areas are linked to Bider markings, suggesting TBX3's role in this specific pigment pattern, while further investigation is needed on its regulation.

In this study, whole-genome sequencing of Lanping black-boned sheep identified ERBB4 and ROR1 genes as potentially important in their distinctive hyperpigmentation, enhancing understanding of their genetic evolution from Lanping normal sheep.

This review discusses the role of oxidative stress in hair greying and suggests that understanding melanocyte susceptibility at different follicular locations may help develop therapies for preventing and reversing the process; it reports no new experimental results.

This study investigated novel genetic tools to manipulate hair follicle compartments in mice and found that altering dermal papilla genes can significantly impact hair pigmentation.

This review explores the complex biological process of hair graying, highlighting oxidative stress, genetic factors, and interventions like antioxidants and genetic therapy as key aspects affecting the preservation of hair pigmentation.

In this animal study, researchers observed that tooth loss in young mice led to premature gray hair growth in the interbrow area, likely due to reduced mastication affecting nerve input.

This review discusses Becker's Melanosis and Hypertrichosis in young males, summarizing cases observed in Melbourne with clinical and histological analyses, but reports no new clinical findings.

This study observed that bleaching brown human hair with persulfate salts and hydrogen peroxide induced significant conformational changes in keratin, particularly affecting disulfide bridges and oxidized sulfur species, which may inform the development of hair restorative treatments.

This review discusses changes in hair follicle characteristics and stem cell dynamics as indicators of aging in mice, noting increased occurrences of white hairs and curved hair follicles at older ages.

In this study, 55 pediatric patients with hidradenitis suppurativa were assessed, revealing common comorbidities like obesity and acne, a frequent delay in diagnosis, and that most patients experienced symptom improvement with treatment including antibiotics and hormone therapy.

This study observed that overexpression of Bcl-2 in certain transgenic mice accelerates catagen progression and increases hair follicle apoptosis and alopecia, while Bcl-2 deficient mice show delayed hair growth and pigmentation changes.

This animal study observed that while topical MBEH and intraperitoneal phenol induced hair graying in eumelanic mice, they had little effect on pheomelanic mice, and amcinonide reduced certain epidermal melanocytes in both.