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This review discusses the evolving understanding of epithelial stem cells, noting how new models challenge old assumptions and suggesting multiple stem cell populations contribute differently to skin and hair follicle regeneration.

This study found that the enzyme encoded by Dgat1 acts as a retinol acyltransferase in murine epidermis, protecting against retinoid toxicity and alopecia by preventing retinol accumulation.

The document concludes that treatments like oral anti-androgens, minoxidil, and topical spironolactone can be effective for hair loss in men and women.

In this study of hair loss treatments, patients using a combined regimen of minoxidil, finasteride, and supplements showed significant hair density and caliber improvements within 2-4 months, sustaining these gains for up to two years.

This review discusses hormone replacement therapy for women with premature ovarian insufficiency, strongly recommending it for symptom relief and bone protection, but notes a lack of evidence on optimal types and doses.

This review discusses the cyclical phases of hair follicle transformation and the various factors that regulate hair growth, reporting no new clinical results.

This review discusses the potential of a low-dose comprehensive cyclical nutrient therapy for enhancing hair growth and strengthening hair roots, but reports no new experimental results.

This study reveals that overexpression of Wnt3 in transgenic mouse skin leads to a short-hair phenotype and cyclical balding due to structural defects in hair shafts, highlighting a role for WNT signaling in hair growth regulation.

This study found that hair follicles in mouse skin use common activator/inhibitor signals to maintain cyclical hair growth across different regions, with varying dynamics influenced by distinct anatomical domains.

This study reveals that human hair follicles transition between active and dormant states stochastically, challenging the idea of a cyclical automaton controlling hair growth.

This article reviews the anatomical complexity and developmental aspects of hair follicles for analyzing abnormalities, but reports no new clinical findings.

This study found that α-melanocyte-stimulating hormone increased melanin production in hair follicles of moulting Siberian hamsters, whereas [8-arginine]-vasotocin inhibited melanin production without affecting tyrosinase activity.

This review summarizes the role of miRNAs in epidermal and hair follicle development, highlighting their potential impact on understanding gene regulatory networks and applications in disease treatment and molecular breeding.

This paper reviews the classification and diagnostic approaches for different types of alopecia, emphasizing the importance of early etiological diagnosis to prevent irreversible hair follicle damage in scarring forms.

This study found that canine hair follicle stem cells are located in the isthmus/bulge region of the hair follicle, surrounded by telocytes.

This review describes human hair follicle behavior and suggests that glycans may play a key role in controlling hair follicle growth, but reports no new clinical results.

This review describes the dual influences on hair follicle homeostasis, proposing it as a "Yin Yang" paradigm, and highlights glycans as a potential key in hair follicle growth control; no new clinical results are reported.

This review discusses Dr. Gill Westgate's background in hair growth regulation and industry experience, but reports no new findings or results.

This essay discusses the establishment, maintenance, and role of skin stem cells in tissue homeostasis, wound repair, and their relation to skin cancer, without reporting new experimental findings.

This review highlights various methods of stem cell communication that reflect the unique organization and function of different tissues and reports no new results.

This review highlights the challenges of using hair mineral analyses as precise indicators of mineral status due to various influencing factors, suggesting they may be informative when combined with other indicators.

This review discusses the unique features of dermal white adipose tissue, its interaction with hair follicles, and its role in skin physiology, reporting no new experimental findings.

In this study, synthetic vitamin D3 analogs stimulated hair growth and formation of normal hair follicles in nude mice, unlike the natural form 1,25 dihydroxyvitamin D3.

This study reports the cloning and sequencing of two type II hair-specific keratin genes, ghHb1 and ghHb6, located on chromosome 12q13, which are expressed during hair growth.

This study outlines a method to isolate hair follicle stem cells from mouse skin using fluorescence activated cell-sorting for use in research models, but reports no experimental findings.

This article reviews current hair loss treatments, proposing a hypothesis that a combination of drugs, supplements, and therapies may effectively manage hair loss, but presents no new clinical results.

The book discussed in this abstract is a comprehensive guide to hair analysis, detailing the latest methods and applications across various fields such as toxicology and drug monitoring, designed for both newcomers and experts in the field.

In this study, researchers observed that fasting-induced molting in laying hens led to increased thyroid hormones, which may regulate feather molting by affecting hair follicle growth through specific signaling pathways, highlighting molecular changes during induced molting.

Hair loss is more common in summer and fall.

This historical analysis compared hair care products and methods from the 19th/20th centuries to those from the 20th/21st centuries, showing the evolution and scientific advancement in hair treatments while highlighting modern inspirations drawn from past concepts.