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This article previews a Journal of Investigative Dermatology quiz on diagnosing male androgenetic alopecia and offers no new research results.

In this study, researchers standardized the Koelle and Friedenwald technique as modified by Gomori to reliably demonstrate discrete enzyme localization around eyebrow hair follicles in humans.

This study concluded that estimating split thickness skin graft take by observation is as reliable as using the Image J digital program.

A new computer tool quickly measures hair thickness differences in people with common types of hair loss.

This quiz presents educational questions about alopecia areata, including its diagnosis and underlying mechanisms, but reports no new clinical outcomes.

In this study, researchers found that transverse sections of alopecia areata lesions showed significantly more terminal hair follicles with perifollicular lymphocytic infiltrate compared to longitudinal sections, and this immune infiltration positively correlated with the positive hair pull test in patients.

This study established standard trichoscopy norms for adult white females, providing benchmarks for hair thickness, percentage of thin hairs, and pilosebaceous units with single hair across different scalp areas.

This study investigated the effects of a derma pen treatment using green betel leaf extract cream on hair development in female Wistar rats, highlighting the antioxidant and anti-inflammatory properties of betel leaves that may aid in hair growth and condition.

This study developed and tested a new algorithm for analyzing coat and skin coloration in laboratory animals, using digital images and hierarchical color clustering, which effectively quantified color proportions and tracked changes over time without specialized software.

This article reviews optimal patient selection and donor site quality for successful hair transplant procedures, but reports no new clinical findings.

This review examines scalp contact dermatitis, attributing most positive patch test reactions to hair dyes, hair cleansing products, and medicaments, but presents no new research findings.

In this study, Scalp Immersion Proxigraphy (SIP) was shown to produce more accurate measurements of linear hair growth rate than crude phototrichogram techniques, suggesting SIP's suitability for clinical trials monitoring hair growth.

This study found that methanolic leaf extract of Plumbago zeylanica L. demonstrates strong thrombolytic and antioxidant activities and shows promise as a source of such agents.

This study reports that a hair shedding threshold of 100 hairs or more may provide the best concordance with clinical diagnosis for distinguishing chronic telogen effluvium from androgenetic alopecia.

In this study, 70 patients with alopecia areata who received intralesional triamcinolone showed a significant reduction in black dots, yellow dots, broken hair, and tapering hair, while achieving a 60% success rate in hair regrowth.

This study found that an alcoholic extract of Glycyrrhiza glabra significantly reduced prostate weight and serum testosterone in castrated rats given testosterone, indicating potential antiandrogenic properties.

This phase II study found that a 0.05% topical dutasteride solution was more effective than oral finasteride (1 mg/day) in increasing hair count and width in males with androgenetic alopecia over 24 weeks, without causing irritation.

This study found that a 2% climbazole shampoo had significant residual antifungal activity on beagle hair shafts, which increased after subsequent use of a physiological shampoo.

This case report highlighted the use of dermoscopy not only for diagnosing skin disorders but also as an educational tool to inform patients about the harmful effects of unqualified medical advice, particularly highlighting the quackery issue in dermatology.

In this study, researchers developed a 3D in vitro model using decellularized Dupuytren’s disease tissue seeded with patient-derived fibroblasts, providing a platform to test antifibrotic therapies like minoxidil and demonstrating more complex drug responses than traditional 2D cultures.

This study demonstrated that while the proposed placebo microneedle stamp design was partially successful in blinding participants with low skin sensitivity, further development of suitable placebo controls is needed.

This study developed a simple and reliable technique to quantify hair loss in mice, potentially enhancing assessment and comparison of new alopecia therapies in preclinical research.

This case report found that intense focused skin tightening ultrasound reduced excessive underarm sweating by nearly 80% in two patients and was associated with temporary side effects like tenderness and redness.

This study validated an HPLC analytical method for evaluating fenasteride in commercial products, finding it to be sensitive, selective, and within acceptance criteria for specificity, precision, and stability, making it suitable for quality control testing.

In this animal study, methanolic extract of *Cordia plathytyrsa* increased testosterone synthesis in male rats but had limited effects on metabolic parameters, while *Piptadeniastrum africanum* raised triglycerides and both extracts did not cause oxidative stress.

This study found that applying dexamethasone to mice induced catagen-like follicle changes significantly earlier and more consistently than a vehicle, such changes being useful for studying hair follicle regression.

This study found that both intradermal injection and derma roller techniques for QR678Neo® hair regrowth therapy improved androgenetic alopecia symptoms, with intradermal injections showing non-significantly better video-microscopic outcomes but more pain and erythema associated with derma rollers.

A dissolving microneedle patch with dutasteride offers effective, long-lasting hair loss treatment with fewer side effects.

This study developed a new quantitative method to measure skin cell turnover in just 4 days, showing it can effectively differentiate skincare product performance and revealing that turnover slows with age but responds more to treatments as people get older.