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This review examines systemic drugs that can cause changes in hair color and emphasizes the importance of reporting these adverse events, but it does not include new clinical outcomes.

This paper reviews the hair color changes associated with valproic acid treatment, noting only a few reported instances of bleaching or darkening, and reports no new findings.

This case study reports a man with rapid hair thinning, whitening, and sparse beard, linked to an increased proportion of hair follicles in catagen or telogen phase and peribulbar lymphocytic infiltrate.

Pilocarpin can cause hair regrowth and color change in some cases but not in others, and it may have side effects in animals.

This study observed that injecting mice with α-MSH resulted in black hair regrowth in shaved and plucked areas, suggesting a potential link to the agent darkening hair in animals with a specific pituitary tumor.

This study found that while many drugs are reported to cause hair color changes, substantial evidence supporting a true relationship exists mainly for chloroquine and certain cancer chemotherapeutic agents.

Valproic acid can cause hair loss, but information on hair color change is not detailed.

This study analyzed gene expression changes during the autumn coat color change in mountain hares and found conserved gene regulation with snowshoe hares, highlighting its role in seasonal camouflage adaptation.

In this study, researchers evaluated the stability and color changes of compounded minoxidil formulations used for alopecia, finding that while the formulations remained chemically and microbiologically stable for up to 380 days, significant color changes were observed, which likely do not affect the product's effectiveness.

This letter to the editor discusses the use of systemic minoxidil for loose anagen hair syndrome, noting a significant change in hair color, but reports no new study results.

This study in a Lithuanian veterinary clinic observed diverse histomorphological skin changes in alopecic dogs caused by various rare diseases, including hyperkeratinization and pigmentation disorders.

This review examines the adaptive value and mechanisms of seasonal coat colour moulting in birds and mammals, highlighting the challenge of camouflage mismatch and the necessity for evolutionary adaptation under climate change.

Patients often experience long-lasting changes to their hair after stem cell transplants.

This review discusses recent advances in the understanding of follicular melanogenesis and its pathological changes, particularly how these changes are associated with specific disease phenotypes, but it reports no new results.

This review highlights the possibility of safely altering hair color through innovative cosmetics by targeting key biological processes in hair follicles, using insights from mammalian pigmentation studies and drug-induced hair color changes as potential pathways.

In this study, seasonal hair loss was most pronounced in low-ranking male vervet monkeys, and changes in scrotal color and hyperpigmentation also correlated with hair loss, but underlying causes were not identified.

This study observed that in wild snowshoe hares, gene expression patterns during seasonal coat color change show a consistent lag between gene expression and visible coat color changes.

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 review discusses skin disorders in women of color, highlighting unique presentations like dyschromias from acne, and underscores the need for more research on racial and ethnic differences; it reports no new clinical results.

This article reviews trichoscopic signs of chemotherapy-induced alopecia, including exclamation marks, but reports no new clinical results.

This paper demonstrates that scalp micropigmentation can effectively conceal scalp and hair deformities with high patient satisfaction, offering a non-surgical alternative cosmetic solution.

This study found that UVB radiation primarily causes hair protein loss, while UVA radiation mainly contributes to hair color changes, with no significant differences in mechanical properties observed between photooxidized and non-irradiated hair.

This case study described a Staffordshire Bull Terrier diagnosed with alopecia by color dilution, characterized by gradual hair loss and confirmed through clinical examination and histopathology.

This chapter reviews the skin side effects associated with targeted cancer therapies and emphasizes the importance of collaboration between oncologists and dermatologists without reporting new results.

This review covers skin manifestations in chronic kidney disease, highlighting their impact on quality of life, associated prognostic indicators, and available treatments, but provides no new clinical results.

This review outlines various clinical methods for assessing ageing skin and discusses their application in supporting the efficacy claims of anti-ageing treatments, but it reports no new clinical results.

This article reviews the side effects of topical latanoprost therapy, particularly the hypertrichosis and pigmentation changes of eyelashes and nearby skin, and reports no new clinical results.

This review discusses the interactions and signals affecting skin stem cells and their environments but reports no new experimental results; the authors highlight the need for understanding these processes to enhance tissue rejuvenation and repair.