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This review discusses the mechanisms of hair repigmentation and reports no clinical results; the authors suggest further research into topical treatments for reversing gray hair.

This study observed an unexpected case where a 44-year-old woman developed linear scalp pigmentation, resembling a tattoo, after undergoing a microneedling procedure followed by hair dyeing two days later, emphasizing the need to advise patients on avoiding hair dye application soon after such treatments.

The combination of a plant extract and a peptide can increase hair pigmentation and may reverse greying.

This study found that Sox2 and BMP signaling may be key regulators of pigmentation and melanocyte migration, as suggested by experiments in mice, human biopsies, and cell co-cultures.

In this study, T3 and T4 were found to directly influence human hair follicles in vitro, enhancing keratinocyte proliferation, prolonging the hair growth phase, and affecting pigmentation.

This article examines microscopic structural differences and pigment distribution in various rabbit hair colors and reports no clinical results.

Hair growth is cyclic and influenced mainly by local factors.

This review discusses the cutaneous serotoninergic/melatoninergic system's potential role in skin function and resilience against environmental and internal stresses, but does not report new experimental findings.

This article reviews the design and objectives of the Rotterdam Study, as well as summarizes major findings, without reporting new results.

This review discusses the roles of androgens and estrogens in skin functions and disorders, and highlights the use of estrogen-progestin treatments and anti-androgens in managing hirsutism and acne, without reporting new results.

Manage vitiligo with treatments, address emotions, and use camouflage techniques.

This study found that Wnt signaling in the hair follicle is crucial for coordinating the behavior of epithelial and melanocyte stem cells, which drives hair regeneration and melanocyte differentiation in mice.

This review discusses the protective and stress-buffering roles of melatonin in skin functions and structures but does not present new clinical findings.

This review discusses the effects of visible light on human skin, highlighting its role in pigmentation, thermal damage, and the treatment of several skin conditions, while noting limited sunscreen protection against it; no new clinical results are reported.

This review discusses the biology of hair follicles across various species and their role in fiber quality, but reports no new experimental findings.

This study demonstrates that stem cells from human foreskins, which lack hair follicles, can differentiate into melanocytes and migrate to the epidermis, potentially altering our understanding of pigmentation disorders.

This review provides a comprehensive guide to serum-free human hair follicle organ culture methods, highlighting research opportunities, standardization efforts, and potential applications without reporting new empirical findings.

This review highlights microneedling's promise as an adjuvant therapy for enhanced drug delivery in dermatology, especially for conditions like atrophic scars and pigmentation disorders, though its efficacy for vitiligo is limited.

This study found that shaving was the most helpful and commonly used temporary hair removal method among women with facial hirsutism.

This review discusses the roles of human tissue kallikreins in skin physiology and pathology and reports no new findings, emphasizing their potential involvement in various skin functions and conditions.

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 historical reports of skin changes, such as pseudoacanthosis nigricans, associated with cholesterol-lowering drugs like triparanol and nicotinic acid, but presents no new clinical findings.

This article reviews common hair-care practices among African American patients and discusses how these practices relate to hair and scalp disorders, without presenting new clinical research.

This review discusses the biological properties of 18β‐glycyrrhetinic acid derived from licorice root, highlighting its potential anti-inflammatory, antioxidant, and antimicrobial benefits in treating dermatological disorders, and reports no new experimental results.

This review discusses the advancements and challenges in developing in vitro human skin models incorporating components like vasculature for drug testing and disease research, but reports no new clinical results.

This study found that the EpiLight Hair Removal System achieved approximately 60% hair removal after 12 weeks following a single treatment, indicating effectiveness and safety for long-term hair reduction.

In this study, phenylthiocarbamide intake was associated with hair graying in rats, while switching to tap water led some rats to regain their original fur color, suggesting dietary factors influence pigmentation.

This study found that dermatological issues, such as xerosis and pigmentation, are common in chronic kidney disease patients and increase with the severity and duration of the disease, indicating that dialysis often exacerbates these conditions.

This study demonstrated that EdnrB signaling promotes melanocyte stem cell proliferation and differentiation, enhancing hair and epidermal melanocyte regeneration, especially under conditions of active Wnt signaling.

In this study on Drosophila wings, researchers identified 435 genes with significant expression changes during wing hair morphogenesis, and found new phenotypes for 9 genes through functional validation.