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This review discusses the causes, associated conditions, and treatment options for alopecia areata, such as corticosteroids and wigs, but reports no new clinical findings.

This review discusses how macro-environmental factors such as intradermal adipose tissue and sex hormones influence hair and feather stem cell niches, suggesting environmental targets for regenerative medicine, but reports no new clinical results.

This study reported no significant difference in efficacy or sexual dysfunction risk between 5α-reductase inhibitors and placebo for androgenetic alopecia, suggesting that dutasteride 0.5 mg may be considered pending further research.

This review summarizes the dermoscopic structures associated with infectious and inflammatory skin conditions and hair disorders in children but reports no new clinical results.

This chapter reviews the role of androgen receptors in mediating the actions of androgens in specific tissues and provides no new experimental findings.

Dermal exosomes with miR-218-5p boost hair growth by controlling β-catenin signaling.

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, oral zinc supplementation for twelve weeks increased serum zinc levels in alopecia areata patients with low zinc, showing positive hair regrowth in 66.7% of participants, though this was not statistically significant.

This study found that overexpression of Hoxc13 in GC13 mouse models affects hair follicle differentiation by interacting with medulla-specific genes, particularly Foxq1, suggesting a regulatory pathway for medulla differentiation.

In this study, blocking the CXCR3 receptor in mice prevented the development of alopecia areata by inhibiting the accumulation of specific T cells in the skin, suggesting a potential therapeutic approach for humans.

This study found that brain-derived neurotrophic factor (BDNF) inhibited hair shaft elongation and induced premature catagen development in cultured human hair follicles, partially through transforming growth factor β2.

This research reported that squarticles, nanoparticles made from sebum-derived lipids, enhanced the follicular delivery and skin accumulation of diphencyprone and minoxidil, indicating effective drug deposition with reduced systemic absorption in alopecia treatment.

This review discusses the challenges and contradictions in understanding nanoparticle penetration and toxicity in human skin, emphasizing the need for standardized testing and further research on particles smaller than 10 nm.

This study found that overexpression of Wnt1a in bone marrow mesenchymal stem cells enhanced mouse hair follicle regeneration and promoted hair cycling.

This review examines testosterone's role in male health and aging but reports no new clinical results; the authors highlight the need for further research on optimal testosterone levels to prevent age-related conditions.

This review concluded that FDA-cleared low-level laser therapy devices are safe and effective for patients with male and female pattern hair loss who do not respond to or tolerate standard treatments.

This article explores how extrafollicular environments and stem cell configurations influence hair and feather regeneration but provides no new experimental results.

Small white dots on the scalp seen with a dermoscope correspond to sweat ducts and vary with different hair disorders.

This study explored the complex roles of niche cells in regulating hair follicle stem cells, identifying specific cell functions such as signaling, sensing, and relaying messages, which could provide insights into treating hair loss conditions like androgenetic alopecia and alopecia areata.

This review discusses current therapeutic targets and treatments for androgenic alopecia but reports no clinical results; the authors highlight the challenge of developing multi-target drugs for effective treatment.

This review discusses the relationship between SHBG, NAFLD, and PCOS and reports no new clinical results; the authors highlight low hepatic SHBG production as potentially significant in PCOS pathogenesis.

This study found that male pattern baldness in European males is strongly heritable and associated with genetic markers linked to earlier puberty, bone density, and pancreatic function.

This study found that testosterone and 5α-dihydrotestosterone induced apoptosis in dermal papilla cells from nonbalding scalp regions, suggesting a high androgen stimulus can trigger cell death related to androgenetic alopecia.

This review discusses how androgens may regulate wound healing and inflammation, noting that testosterone appears to inhibit healing and promote inflammation, but it reports no new clinical results.

This study found that platelet-rich plasma significantly increased hair count, density, and the percentage of anagen hairs in patients with androgenetic alopecia, but these improvements did not correlate with platelet or growth factor levels.

This review discusses recent advances in using nanocarrier-loaded gels for various medical applications and reports no new clinical results, highlighting potential advantages in therapeutic strategies.

This study concluded that 5α-reductase inhibitors were linked to increased sexual dysfunction in men with benign prostatic hyperplasia, but not in men with androgenetic alopecia.

This review discusses the role of Prostaglandin D2 and its synthase in androgenetic alopecia but reports no new clinical findings, suggesting pathways for future therapeutic development.

This review discusses clinical features, differential diagnosis, and treatments for female pattern hair loss, emphasizing the use of 2% topical Minoxidil and exploring alternative off-label therapies.

This article reviews methods to enhance epithelial–mesenchymal interactions for hair follicle bioengineering but does not present new experimental results; it emphasizes optimizing combinations for successful regeneration.