Androgenetic Alopecia

This review explores the mechanisms, current products, challenges, and innovative approaches related to cosmetics for hair loss prevention and growth promotion, emphasizing the need for multidisciplinary cooperation to enhance product development and market success.

This review highlights the available and investigational anti-androgen treatments for female pattern hair loss in the US, noting their limitations and the potential for fewer systemic side effects with topical options compared to oral medications.

This source provides an overview of expert practices for using topical and low-dose oral minoxidil in treating hair loss, highlighting how dermatologists apply existing literature to ensure safe and effective treatment.

This study found that genetic predictions of male pattern baldness from European populations do not generalize well to African populations, highlighting significant differences in genetic architecture between them.

This article discusses the pursuit of more effective treatments for androgenetic alopecia due to its widespread psychological and social impact, but reports no new clinical findings.

This study found that snoring during sleep, frequent consumption of bacon and preserved meats, and drinking unboiled water, along with older age and suboptimal health, were associated with a higher likelihood of female androgenetic alopecia in a community-based sample of women in China.

GLP-1 RA medications may be linked to hair loss.

In this study, researchers found that treating senescent human dermal papilla cells with dasatinib and quercetin improved their ability to regenerate hair follicles by depleting senescent cells and enhancing inductive potency, suggesting potential clinical applications for senolytic treatments in cell-based hair restoration therapies.

In this retrospective analysis, dutasteride mesotherapy was used in 10 patients with androgenetic alopecia and resulted in hair density and width changes measured at the scalp, but specific efficacy results are not detailed in the abstract.

Botulinum toxin is not effective or cost-efficient for treating male pattern baldness.

This abstract discusses finasteride and dutasteride's mechanisms in treating androgenetic alopecia and notes FDA approval for finasteride, but reports no new clinical results.

In this case series, low-dose oral metformin was associated with improvements in symptoms and gene expression changes in Black female patients with treatment-resistant central centrifugal cicatricial alopecia, suggesting a potential therapeutic role for metformin in managing this condition.

This study investigates differences in nutritional status, vitamin, and mineral levels between individuals with telogen effluvium and a control group, aiming to understand the nutritional factors involved in this condition.

This study found distinct hair loss patterns among 112 women with female pattern hair loss, identifying unique presentations specifically in Asian, including South Asian, and Black women, which may influence treatment response across different racial groups.

Botulinum toxin may help treat male pattern baldness.

This study found that 63.4% of androgenetic alopecia patients showed clinical improvement after 6 months of low-dose oral minoxidil, with patients having low sulfotransferase activity in hair follicles responding more favorably than those with high enzyme activity.

This study identifies specific trichoscopic features such as empty follicles and perifollicular erythema in Caucasians with frontal fibrosing alopecia, which may assist in diagnosis and monitoring, but stresses the need for further research due to limited demographic data.

Tirzepatide may improve hair loss by reducing insulin resistance.

The study concluded that dutasteride 0.5 mg daily for 24 weeks was the most effective monotherapy for increasing hair density in men with androgenetic alopecia, compared to other interventions.

This review explores the risk factors, associated comorbidities, and psychological impacts of early-onset androgenetic alopecia, highlighting its complexity and potential implications for treatment response and overall health.

This source suggests that oral minoxidil could be a safe and effective treatment option for both female and male androgenetic alopecia, although it is currently used off-label.

Microneedling combined with other treatments significantly improves hair growth in people with hair loss and is safe.

This retrospective study of 500 female patients with telogen effluvium found that those with hypothyroidism had more severe hair loss compared to those with normal thyroid function or hyperthyroidism, highlighting the importance of thyroid function testing in these cases.

This study found that men who smoke are more likely to develop androgenetic alopecia and experience disease progression compared to non-smokers.

This study compared the effectiveness of topical finasteride, oral finasteride, and topical minoxidil over 12 months in postmenopausal women with androgenetic alopecia, exploring their therapeutic effects on this population. Results are not reported in the abstract.

In this prospective study, patients with androgenetic alopecia who underwent hair transplantation showed significant improvements in quality of life and life satisfaction, with reduced stress and anxiety levels, although depression and perceived social support did not significantly change.

This study found that no-shave long hair-follicular unit excision using a skin-responsive device, without recess-tipped punches, yielded low graft transection and shaft break rates, improved procedure speed, and increased surgeon willingness.

This review presents European expert guidelines for diagnosing androgenetic alopecia across genders but reports no new clinical findings; it emphasizes the importance of trichoscopy for differentiating similar conditions.

This review outlines hair restoration surgery complications, particularly focusing on the iatrogenic causes associated with follicular unit excision, but it presents no new research findings.

In this study, researchers used 3D bioprinting to successfully create engineered skin tissues with hair follicle-like structures, potentially enhancing skin grafts and safety testing for chemical compounds by more closely mimicking natural skin complexity.

In this study, male-pattern baldness was strongly associated with a higher risk of keratinocyte cancers, particularly squamous cell carcinoma and melanoma, likely due to increased sun exposure on the scalp rather than androgen levels.

In this study, injecting dermal sheath cup cells into affected areas of pattern hair loss improved hair thickness and patient-reported hair appearance in 62.9% of the participants, with better results in women, without serious side effects.

In this study, the researchers found that rare genetic variants make a minor contribution to male-pattern hair loss risk, identifying five significant gene associations, including novel genes, and noting a shared basis with monogenic hair loss disorders.

This study found that WNT10A variants are associated with short anagen hair in children and may overlap genetically with male pattern hair loss.

Using minoxidil with microneedling increases hair count for hair loss without serious side effects.

This systemic review and meta-analysis found that men with androgenetic alopecia generally experience moderate impacts on quality of life, but limited evidence of severe effects on mental health.

This study reviewed evidence suggesting that certain types of wounds might stimulate localized hair growth in humans, noting anecdotal reports and mixed efficacy of treatments like microneedling and lasers for androgenetic alopecia, but emphasized that further research is needed.

This study observed unexpected heterogeneity among pigment cells in human scalp hair follicles, identifying immature melanocyte populations outside traditional pigment production zones, raising questions about their potential roles beyond melanin synthesis.

This study describes androgenetic alopecia as a common non-scarring hair loss condition primarily influenced by genetic factors and androgen sensitivity, notably impacting psychosocial well-being, especially in females and younger males seeking treatment.

This review suggests that combining PRP with minoxidil may be more effective for promoting hair growth in androgenetic alopecia than using either treatment alone, although study variations limit definitive conclusions.

In this study using genetic mouse models, researchers discovered that senescent melanocytes in nevi secrete osteopontin, which activates hair stem cells, enhancing hair growth; this process is mirrored in human hairy nevi, suggesting a potential therapeutic target for regenerative disorders.

In this viewpoint, researchers discussed the possible role of the developmental origin of scalp dermis in influencing the specific pattern of hair follicle miniaturization seen in male pattern hair loss, noting that frontal follicles are more susceptible while occipital follicles remain largely terminal.

This review examines the efficacy of various novel treatments for androgenetic alopecia, including oral minoxidil and platelet-rich plasma, suggesting potential benefits but emphasizing the need for further high-quality clinical trials to thoroughly evaluate their effectiveness.

This review discusses the current status of genetic research on male-pattern hair loss and reports no new findings, outlining significant achievements and future challenges in understanding its biology and treatment.

This study found that hair transplant surgery significantly improved self-esteem and quality of life in patients with androgenetic alopecia.

In this retrospective study from North France, apremilast was used in patients with psoriasis and recent cancer, showing a good safety profile and improved quality of life, though with 65.2% experiencing non-serious adverse events. The need for further research on oncological safety was highlighted.

In this study, miR-221 was identified as a key factor in androgenetic alopecia pathogenesis due to its role in suppressing hair growth by interacting with androgen receptors and affecting related pathways.

This study found that high consumption of sugar-sweetened beverages is associated with an increased risk of male pattern hair loss among young men in mainland China.

This letter highlights the lack of evidence on managing persistent alopecia induced by chemotherapy and endocrine therapy in breast cancer patients, noting that prior studies have not included endocrine therapy-induced alopecia.

This review discusses the development of hair-on-a-chip technology for hair follicle research and alopecia treatment, reporting no new clinical results but highlighting future research directions.

This study found that platelet rich plasma (PRP) is a safe and effective treatment for alopecia areata, with no significant difference in efficacy between activated and non-activated PRP.

This article explores how adult mammals can regenerate hair follicles after wounding and suggests that manipulating cell signals during healing might enhance this process, but provides no new experimental results.

This study revealed that BMP5 in onychofibroblasts may play a key role in the differentiation of nail matrix keratinocytes, highlighting transcriptional similarities between nail and hair structures.

In this study, Hedgehog signaling in dermal papilla fibroblasts was found to accelerate hair growth and induce follicle multiplication in mice via the SCUBE3/TGF-β pathway, with some effects observed in human scalp hair follicles.

This study in a Korean population identified two novel genetic variants that may increase the risk of androgenetic alopecia, contributing to understanding its genetic basis in non-European populations.

This systematic review found that photobiomodulation therapies using ultraviolet and infrared light effectively treated alopecia areata, while red and infrared light treatments were effective for androgenetic alopecia.

This study characterized the incidence of hair loss patterns among men of different races, highlighting a lack of direct racial comparisons in previous research.

In this study, researchers found that dissolving microneedles made with hyaluronic acid enhanced the effectiveness of minoxidil in reducing hair loss and promoting hair growth in alopecia-affected mice more effectively than topical minoxidil alone, while using only 10% of the drug amount.

This study found that female pattern hair loss was common in postmenopausal women, with body mass index being a significant associated factor.

This study found that androgen receptor signaling is linked to blood vessel regression in the dermal papilla of balding scalp, contributing to hair follicle miniaturization in androgenetic alopecia.

In this South Korean retrospective study, dutasteride improved hair growth more effectively than finasteride in men with androgenic alopecia, and had a similar or possibly lower rate of adverse events, suggesting it as a viable treatment option.

This review reports that clinical studies generally showed favorable results for microneedling as an adjunct therapy for androgenic alopecia and alopecia areata, despite the low quality of existing data.

This article discusses hormonal mechanisms underlying androgenetic alopecia but does not report any new findings; it reviews the roles of dihydrotestosterone and available FDA-approved treatments.

This study found that topical finasteride significantly increased hair count in men with androgenetic alopecia compared to placebo while maintaining similar efficacy to oral finasteride but with lower systemic exposure and a reduced impact on serum DHT levels, potentially minimizing sexual side effects.

This article discusses aspects of dermatology practice in Iran and the USA but presents no new research findings.

This study observed that inflammation in androgenetic alopecia samples was similar to alopecia areata controls, but infundibular and isthmic inflammation were significantly more common in androgenetic alopecia cases.

This study found that androgenetic alopecia is significantly associated with moderate impairment of health-related quality of life and emotions, but not with depressive symptoms.

This commentary reviews potential dietary and mineral influences on androgenetic alopecia and suggests considering a diet low in cholesterol and glycaemic index with improved glucose control and magnesium fortification, without new clinical results.

This study found that intradermal injections of platelet-rich plasma were equally safe and effective for treating androgenetic alopecia, with higher platelet numbers possibly enhancing hair density and follicle diameter.

This article presents the surgical technique of long hair follicular unit excision (FUE) in hair transplantation and reports procedural and outcome data for 134 patients, without evaluating clinical outcomes.

This review explains the evolution and current techniques of follicular unit transplantation for hair restoration, identifying conditions suitable for surgery and offering guidelines for dermatologists to assess candidate suitability, focusing on male and female pattern hair loss.

This review discusses long hair FUE, highlighting its appeal for those seeking discreet hair transplants and noting comparable graft survival and final outcomes to shaven FUE, but reports no new clinical results.

This study found that dihydrotestosterone induced hair loss and changes in hair morphology in male C57BL/6 mice, effects that could be partially reversed by the AR antagonist bicalutamide.

This study demonstrates that dermal white adipose tissue regulates human hair growth and pigmentation through hepatocyte growth factor secretion, highlighting potential therapeutic targets for hair-related disorders.

This pharmacovigilance study found an increased association of suicidality and psychological adverse events with finasteride use, especially among younger patients using it for alopecia.

This perspective highlights the role of inflammation in male and female pattern hair loss and its implications for developing future therapeutic options.

This study reported that low-dose oral minoxidil combined with a 5α-reductase inhibitor improved hair density in most men with female pattern hair loss after 6 months or more of treatment.

This review discusses the use of microneedling for androgenetic alopecia and finds it promising for enhancing hair density and thickness, especially when combined with other treatments, but notes no standardized protocol exists yet.

This study reported that oral minoxidil improved hair density and had an acceptable safety profile in women with androgenetic alopecia.

This study found that sympathetic nerves and arrector pili muscles form a niche that modulates hair follicle stem cell activity, revealing their role in hair follicle regeneration.

In this study, PRP increased hair density in areas treated for androgenetic alopecia, but there was no significant difference when compared to placebo-treated areas.

This review discusses recent genetic findings on hormonal signaling pathways in androgenetic alopecia, reporting no new study results but highlighting the need for further investigation.

This study reports that patients with androgenetic alopecia had lower quality of life scores across all measured domains compared to controls, with disease severity worsening the impact, particularly socially for those under 30.

Scientists created human skin with hair from stem cells, which could help treat hair loss and skin conditions.

This review discusses the use of platelet-rich plasma for treating various types of alopecia, reporting promising preliminary hair regrowth results but noting a lack of quantitative evidence from well-designed clinical trials.

This review discusses various follicular unit excision methods, punch designs, and motorized devices, highlighting their roles in reducing hair follicle transection rates and optimizing graft harvesting for individual patient characteristics.

In this study, intradermal injection of botulinum toxin was associated with increased hair growth in men with androgenetic alopecia through the suppression of TGF-β1 secretion from dermal papilla cells.

This study found that injecting autologous dermal sheath cup cells significantly increased hair density and diameter in male and female pattern hair loss compared to a placebo for up to 9 months.

This review reports no new clinical results but discusses fibrosing alopecia in a pattern distribution as a distinct scarring alopecia with characteristics of both androgenetic alopecia and lichen planopilaris.

This study described specific skin and hair follicle abnormalities in three Japanese patients with Cantu syndrome, which may relate to the regulation role of SUR2 in hair follicle growth.

This study found that a positive family history, especially from the mother's side and including grandparents, is associated with an increased risk of early-onset female pattern hair loss in Polish women.

This review discusses female androgenetic alopecia, highlighting its diagnostic challenges and management strategies, but it reports no new results.

This study found that androgenetic alopecia is a significant yet under-recognized cause of hair loss in children and adolescents, often linked to family history and typically diagnosed by clinical examination.

This study found that Wnt signalling agonists increase and antagonists decrease in human scalp follicles from telogen to early-anagen, with differences from the mouse model suggesting targeted interventions for hair growth disorders.

This study found that persistent chemotherapy-induced alopecia is often more severe and diffuse than alopecia from endocrine therapy, with both conditions negatively impacting patients' emotional wellbeing, and moderate to significant improvement was observed with dermatologic therapy.

This review offers evidence-based recommendations for diagnosing and treating female pattern hair loss, emphasizing clinical assessment and starting treatment with minoxidil, while noting that measurement of certain hormones and vitamins is optional.

In this study, hair transplantation was found to significantly improve self-esteem and satisfaction with appearance among male androgenetic alopecia patients.

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 demonstrated that enhancing human skin constructs with hair follicles through engineered cell organization and vascularization improved hair growth in immunodeficient mice, suggesting potential advances for treating alopecia and chronic wounds.

This review discusses the role of androgens in women's skin-related conditions like acne, hirsutism, and female pattern hair loss, noting the lack of dermatology guidelines for when to pursue endocrinologic evaluation.

This review discusses the use of platelet-rich plasma as a treatment for androgenetic alopecia and highlights the need for standardized protocols, reporting no new clinical results.

In this randomized, double-blind trial, researchers observed that low-level laser therapy led to significantly greater hair regrowth on treated areas compared to a sham treatment in patients with androgenetic alopecia over 24 weeks, suggesting it as a potentially effective and safe option.

This study found that endocrine therapy for breast cancer is associated with a pattern of hair loss similar to androgenetic alopecia, negatively impacting quality of life despite mild severity.

This review discusses the psychological impact of alopecia on women and reports no new clinical findings, highlighting the effect on self-esteem and quality of life.

This study found that women with female pattern hair loss had increased 5α-reductase isozymes and decreased aromatase mRNA levels, potentially affecting their response to treatment.

This study suggests that high consumption of raw vegetables and fresh herbs, which are part of the Mediterranean diet, may reduce the risk of androgenetic alopecia in genetically predisposed men.

This genome-wide association study identified 71 genetic loci linked to male pattern baldness, with 30 novel loci, explaining 38% of the risk and suggesting shared pathways with lifespan and cancer traits.

In this study, researchers found that androgenetic alopecia is associated with increased gene expression related to inflammation, stress, and fibrosis, particularly affecting the hair follicle stem cells and showing similarities to diseases like psoriasis.

In this study, focal atrichia was associated with late-onset female pattern hair loss, providing a clinical clue to its diagnosis, particularly separating it from other hair disorders.

This review discusses the molecular mechanisms of androgens and androgen receptors in skin disorders, particularly androgenetic alopecia, and reports no new clinical results; it highlights potential areas for future treatment development.

This review explores the relationship between androgenetic alopecia and metabolic syndrome, suggesting an association that supports considering cardiovascular risk assessments in patients with this type of hair loss.

This study found that topical cetirizine 1% significantly improved hair density and diameter in patients with androgenetic alopecia, with patients tolerating the treatment well.

This study found that among Caucasian individuals with androgenetic alopecia, being overweight and smoking were associated with greater severity of the condition.

This review summarizes the genetic studies on female pattern hair loss, highlighting the lack of clearly identified susceptibility loci and suggesting distinct aetiological differences from male pattern hair loss.

This study identified overexpression of certain immune-related genes and underexpression of genes in specific signaling pathways in premature androgenetic alopecia, suggesting potential new therapeutic targets.

This systematic review and meta-analysis found that minoxidil, finasteride, and low-level laser light therapy significantly improve hair growth in men with androgenetic alopecia, while minoxidil is also effective for women, compared to placebo.

This study identified 63 genetic loci associated with male-pattern baldness, uncovering genes and pathways that may help develop treatments and suggesting its connection to other human conditions.

In this study, researchers used genetic data from over 52,000 men to identify over 250 genetic loci associated with severe hair loss and developed a predictive algorithm for determining hair loss risk.

In this study, researchers found that the prevalence of androgenetic alopecia was higher in their sample compared to other studies in Asian and Caucasian populations, and it was linked with age-related severity.

This study found that topical minoxidil improved female pattern hair loss, finasteride was not more effective than placebo, and laser devices showed inconsistent results but increased hair count compared to baseline.

This study suggests that stress-induced premature senescence of dermal papilla cells may contribute to hair follicle aging by impairing critical epithelial-mesenchymal interactions and promoting inflammatory cytokine production.

This study reports that male-pattern baldness may be linked to an increased risk of skin cancer, particularly for tumors located on the scalp.

In this study, researchers identified 18 genetic associations with scalp and facial hair traits in Latin Americans, including novel loci for hair greying and balding, with implications for understanding hair evolution.

This review discusses various classification systems for patterned hair loss in both sexes and reports no new clinical findings, highlighting the Hamilton-Norwood and Ludwig systems as the most commonly used.

This study found that topical minoxidil is more effective than placebo in promoting hair growth in androgenetic alopecia, although cosmetically acceptable results occur only in a subset of patients.

This study found that sexual side effects occurred in a small percentage of patients using combined finasteride and minoxidil, but these were not common reasons for discontinuing treatment.

This article presents a comprehensive guide for classifying human hair follicle cycle stages in vivo using scalp xenografts on immunocompromised mice, offering valuable resources for researchers in the field.

This study found that low-dose finasteride use in young men was associated with higher reporting of persistent sexual dysfunction, with some cases linked to suicidal ideation.

In this study, the researchers found that the effectiveness of a 1,550-nm fractional laser in promoting hair growth in mice depends on the specific combination of beam energy and density, with inappropriate settings potentially causing ulcers or hair follicle injury.

This study suggests that oxidative stress may contribute to androgenetic alopecia by inducing premature senescence and secretion of hair growth inhibitors in dermal papilla cells from balding scalp.

This review discusses the potential applications of prostaglandin F2α analogs for certain types of alopecia and hypopigmentation, but reports no new experimental results.

This study found that red light accelerated the transition from the resting to growth phase in hair follicles faster than green and blue light in mice, suggesting it may stimulate hair growth.

This study found that horizontal sections of scalp biopsies in patients with Central Centrifugal Cicatricial Alopecia often reveal follicular miniaturization, inflammation, and scarring, which can guide personalized treatment.

This study identified mutations in the FGF5 gene as a cause of extreme eyelash growth in Pakistani families, highlighting a potential target for regulating eyelash growth.

This study found that in androgenic alopecia, the arrector pili muscle degenerates and is replaced by fat, unlike in normal skin or telogen effluvium.

This study found that dutasteride increased hair growth and restoration in men with androgenetic alopecia more effectively than finasteride and was well tolerated over 24 weeks.

This study supports evaluating metabolic syndrome and insulin resistance in young males with advanced androgenic alopecia to potentially reduce future cardiovascular and type 2 diabetes risks.

This study suggests that a hair follicle enzyme assay may predict response to minoxidil treatment for androgenetic alopecia with high sensitivity and specificity in a preliminary analysis.

This study reviews the significant prevalence of organic etiologies, especially vascular causes, in erectile dysfunction among men under 40 and emphasizes thorough evaluation and consideration of treatment options like exercise and PDE-5 inhibitors.

This study found that altering cell culture conditions to form three-dimensional papilla spheroids can restore the ability of human dermal papilla cells to induce hair growth in adult skin.

This study validated that the 20p11 genetic locus is associated with increased risk of androgenic alopecia in the Chinese Han population, suggesting shared genetic factors between Chinese and European populations.

This review discusses the potential mechanisms and evidence supporting low-level laser therapy for stimulating hair growth in men and women, while noting its safety and effectiveness but needing further study on specific parameters.

This review discusses the current therapeutic options for female pattern hair loss and emphasizes the need for managing patient expectations of permanent regrowth, reporting no new clinical results.

This study provides evidence that a polygenic component contributes to the heritable risk for androgenetic alopecia, indicating the need for further research to identify the complex biological pathways involved.

This study found that topical minoxidil improved the quality of life in female patients with pattern hair loss.

Four genetic risk spots found for hair loss, with WNT signaling involved and a link to curly hair.

This study suggests that the presence of more than six vellus hairs in the frontal scalp at 20-fold magnification can be an additional criterion for diagnosing early female pattern hair loss.

This study reported that female pattern hair loss was prevalent in 11.8% of women aged 30 and older and was associated with high fasting glucose, fewer childbirths, oral contraceptive use, and excessive ultraviolet exposure.

This article reviews current knowledge on the causes, diagnosis, and medical treatments for androgenetic alopecia, particularly in men, and reports no new findings.

This study found that loss of contact between the arrector pili muscle and the hair follicle bulge may explain why hair loss in male and female pattern baldness is largely irreversible, unlike in alopecia areata.

This study found that early-onset androgenetic alopecia in individuals of European ancestry is significantly associated with increased odds of Parkinson's disease and is influenced by specific genetic loci, including some linked to reduced fertility.

This study found that dermoscopy-guided scalp biopsies provided a definitive pathological diagnosis in 95% of patients with cicatricial alopecia.

PGD2 stops hair growth and is higher in bald men with AGA.

This review discusses the dermoscopic features of common hair and scalp disorders and reports no new clinical results, aiming to assist dermatologists in diagnosing conditions like tinea capitis and alopecia areata.

This study found no significant association between selected gene variants and female pattern hair loss, suggesting these genes might not be involved in its development.

This study found that androgens inhibit hair follicle stem cell differentiation by disrupting the Wnt signalling pathway in dermal papilla cells, but Wnt activation can restore differentiation.

This study suggests that the HDAC9 gene is a third susceptibility gene for male-pattern baldness, with significant associations found in both German and Australian samples.

IL-6 contributes to hair loss by shortening the growth phase and causing hair follicles to regress.

In this study, latanoprost significantly increased hair density in young men with mild androgenetic alopecia after 24 weeks, suggesting it may stimulate hair follicle activity and treat hair loss.

This study identified distinct dermoscopic patterns associated with different types of scalp tumors, highlighting variability in lesions related to patient age, gender, and tumor thickness.

This study found evidence of increased DNA methylation of the androgen receptor gene in occipital hair follicles from men with androgenetic alopecia.

In this study, oral finasteride improved the quality of life for male patients with androgenetic alopecia, but it did not significantly reduce anxiety or correlate with reported anxiety levels.

This guideline reviews the diagnosis of androgenetic alopecia and offers expert consensus recommendations tailored to males, females, and adolescents, but reports no new clinical results.

This study found a significant association between androgenetic alopecia and metabolic syndrome, highlighting high-density lipoprotein cholesterol as a particularly important factor.

This case report describes a patient with complete androgen insensitivity syndrome experiencing female pattern hair loss, suggesting that factors beyond direct androgen action may contribute to this condition in women.

This study found that loose anagen hair syndrome is a common form of alopecia in young girls, typically presenting with thin, sparse hair and usually confirmed by a hair-pull test.

This article discusses the potential relationship between androgenic alopecia and insulin resistance but presents no new clinical findings, calling for further research on the topic.

This study found that the prevalence of androgenetic alopecia in Chinese men was lower than in Caucasian men, similar to Korean men, and most commonly presented as type III vertex.

This review summarizes fundamental concepts and recent advancements in hair follicle biology, including insights from mouse models into broader molecular and cellular processes relevant to regeneration and development.

In this study, the hair transplantation complication rate was found to be 4.7%, highlighting the importance of thorough patient assessment, surgical precision, and postoperative care.

This review discusses the advantages and limitations of various hair loss evaluation methods but reports no new results; it emphasizes the importance of cautious interpretation for these diagnostic tools.

This study found that 58% of men aged 30-50 had androgenic alopecia, with disease severity increasing with age and many being candidates for medical treatment or hair transplantation.

In their study, Tim Spector and colleagues identified a new genetic association at chromosome 20p11.22 with male-pattern baldness, confirmed by the increased risk when combined with a known androgen receptor gene variant.

This study found that human hair follicles express ATP-sensitive potassium channels, suggesting that minoxidil acts on these channels and that drugs targeting them may treat hair disorders.

This study found that balding dermal papilla cells show premature senescence and altered expression of stress and DNA damage markers, suggesting sensitivity to environmental stress in androgenetic alopecia.

This article discusses treatment options for androgenetic alopecia, noting that medical interventions like finasteride and minoxidil can halt and partially reverse hair loss in mild to moderate cases, especially when combined with surgery.

This study describes the development of the BASP classification system, providing a universal and systematic approach for classifying pattern hair loss in both men and women.

The researchers reported that adenosine increases FGF-7 expression in dermal papilla cells, which may stimulate hair growth via the A2b adenosine receptor and cAMP pathway.

This review discusses the dermatologic features of PCOS as potential early indicators of the syndrome and notes that treatment of these conditions may enhance quality of life and psychological well-being, but it reports no new clinical results.

The study found that prolactin expressed in human scalp hair follicles acts as an autocrine modulator, inhibiting hair growth and promoting hair follicle regression, which may contribute to hair loss in hyper-prolactinemia patients.

This study found that bulge cells marked by CD200+ in human hair follicles show high colony-forming efficiency, suggesting successful enrichment of keratinocyte stem cells.

This study found that the prevalence of androgenetic alopecia increases with age among both men and women in Maryborough, Australia, with 57% of women and 73.5% of men aged 80 and over affected.

This study found that macrophage-stimulating protein (MSP) enhanced hair growth in both human hair follicles cultured in vitro and in mice through the promotion of anagen phase induction.

This article reviews the mechanisms by which minoxidil stimulates hair growth and reports no new clinical findings.

Male pattern baldness is largely genetic, linked to the androgen receptor gene, and may relate to certain health issues.

In this study, the researchers did not confirm previously reported links between AGA and smoking or benign prostatic hypertrophy, but found potential associations with alcohol consumption and lean body mass at age 21 that merit further investigation.

This article reviews various topics discussed at a workshop on hair disorders, focusing on hair biology, diagnosis, and challenges in therapy evaluation, without presenting new clinical findings.

This study found no significant associations between the polymorphisms of SRD5A1 and SRD5A2 genes and androgenetic alopecia, clinical types of baldness, or response to finasteride in Koreans.

This review suggests that androgenetic alopecia may be exacerbated by exposure to ultraviolet radiation and proposes considering it as a photoaggravated condition requiring photoprotection.

This study reports that the prevalence of male pattern baldness in Asians is higher than previously believed, with potential links to socioeconomic factors and westernized diets, though the exact cause remains unclear.

This paper introduces the Follicular Unit Extraction procedure and its accompanying FOX Test, finding that 60% of tested patients were suitable candidates for this minimally invasive hair transplantation method.

This article explores the hormonal and genetic factors influencing androgenetic alopecia and identifies potential targets for treatment but reports no new clinical findings.

This study found that steroid sulfatase in the dermal papilla of hair follicles metabolizes dehydroepiandrosterone sulfate to support the development of androgenetic alopecia, suggesting potential for steroid sulfatase inhibitors as treatments.

This study found that osteopontin mRNA is abundantly expressed in dermal papilla cells during the catagen phase of hair growth in rats, suggesting a role in this phase.

Hair loss in women is genetic, diagnosed by examination and biopsy, and treated with minoxidil, finasteride, or transplantation.

This study suggests that miniaturization in pattern hair loss may occur abruptly and can be reversed with treatment, as supported by histologic evidence in finasteride-responsive patients.

This review discusses the suitability of stump-tailed macaques and rodent models for studying hair growth and developing treatments for androgenetic alopecia, but reports no new experimental results.

In this study, the prevalence of androgenetic alopecia among Korean men and women was found to be lower than in caucasians, with Korean men showing more frontal hairline preservation and a higher incidence of 'female pattern' hair thinning.

This review discusses the relationship between perceived stress and hair loss or graying, exploring hair follicles as a model system but reports no new clinical results.

FPHL affects hair density and diameter, causing visible hair loss in older women.

This study reports that some patients with androgenetic alopecia may also exhibit clinical and histological features of inflammation and fibrosis, similar to those found in lichen planopilaris.

In this study, Norwegian men aged 20-50 who perceived themselves as having more hair loss reported greater dissatisfaction and concern about aging compared to those without hair loss.

This article discusses the biologic and psychosocial significance of hair, the current limitations in hair growth drugs, and anticipates future therapies based on advancing hair follicle research.

This study found that hair transplant surgeons can use a new model to predict the number and distribution of follicular units in donor scalp areas based on patient hair density.

In male pattern hair loss, this study found that finasteride 1 mg daily significantly slowed hair loss and increased hair growth over two years compared to placebo.

This study found no significant genetic association between the 5α-reductase enzyme genes and male pattern baldness, suggesting a polygenic etiology rather than simple inheritance.

This study found that androgen metabolism within hair follicles varies significantly between compartments, with dermal papillae showing high 5α-reductase activity, suggesting a key role in androgen-driven hair growth responses.

This review discusses follicular transplantation for hair restoration, highlighting the importance of evaluating patient suitability and careful planning to achieve excellent cosmetic outcomes, but reports no new research findings.

This paper reviews follicular hair transplantation techniques and planning, emphasizing careful evaluation and long-term strategy for achieving excellent cosmetic results.

People with hair loss have more androgen receptors and enzymes in certain follicles, with men and women showing different patterns.

This study introduces a hair transplantation method combining elliptical excision and micrografting, suggesting it provides significant cosmetic improvements for androgenetic alopecia.

This study observed that testosterone metabolism and androgen receptor localization differ significantly across body sites, with beard hair follicles showing distinct characteristics compared to occipital scalp hair follicles.

This study concluded that horizontal sections of scalp biopsy specimens provide more diagnostic information for male pattern androgenetic alopecia than vertical sections and can predict hair regrowth potential following topical minoxidil therapy.

This study found that while the steroid mechanisms influencing androgenetic alopecia may be similar for men and women, differences in enzyme activity and receptor content could explain their varied clinical presentations.

This study suggests that acquired progressive kinking of hair, which typically appears at or after puberty, may be androgen dependent and could progress to male pattern baldness.

This study presents evidence suggesting that androgenetic alopecia is most likely inherited through a polygenic model, challenging the traditional view that it is caused by a simple Mendelian autosomal dominant gene.

Minoxidil effectively controls blood pressure but side effects may limit its use.

This article presents a classification system for stages of female-pattern androgenetic alopecia to aid early diagnosis and mentions existing systems for rare male-pattern cases, but reports no new clinical results.

In this study, the researchers observed that male pattern alopecia is characterized by miniature follicles, enlarged sebaceous glands, and an increased number of mast cells, without significant abnormalities in enzyme activity.