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This article reviews various causes and investigative techniques for different forms of alopecia and reports no new findings.

This study found that the combination of zinc sulfate and calcium pantothenate improved hair density and participant satisfaction in women with hair loss, suggesting its potential as an initial treatment option.

This study found that low-coverage whole-genome sequencing followed by imputation effectively identifies genetic variants associated with wool traits in Angora rabbits, offering a cost-efficient method for genetic research and breeding.

This review found that while vitamin supplementation may improve hair health in individuals with deficiencies, there is limited evidence to support its benefits for those with healthy baseline hair.

In this study, researchers observed that Indian head cactus extract significantly increased the proliferation of human follicle dermal papilla cells and induced the expression of hair growth-related genes, suggesting its potential as a new therapy for promoting hair growth.

In this study, N. ottonis cactus cell extract applied to mice promoted hair growth and increased the number of hair follicles, suggesting its potential as a hair-growth-promoting agent.

This study found that platelet-rich plasma significantly improved hair growth parameters in androgenic alopecia patients and was even more effective when combined with minoxidil, particularly in reducing vellus hair.

This article reviews various types of alopecia, their diagnostic features, and patterns, but presents no new clinical findings; the authors discuss multiple mechanisms and classification challenges.

In this study of dogs with mucocutaneous lesions caused by various dermatological conditions, the researchers observed notable changes in haemato-biochemical parameters and trichographic features, including anaemia, elevated platelet counts, and significant telogen phase hair involvement.

This study found that vitamin B6 injections over several weeks improved hair condition and reduced hair loss in some women with diffuse alopecia, while calcium pantothenate had no clear positive effect.

This study found that loose anagen syndrome was more common in females and observed across all hair colors and skin types.

This letter addresses feedback on a study about the effects of platelet-rich plasma on female androgenetic alopecia, particularly discussing the magnification choices for measuring hair density and caliber.

This abstract provides website information and publication navigation for JAMA Dermatology, but it includes no research results or study findings.

This article reviews the causes and diagnostic approaches for feline alopecia, emphasizing the importance of distinguishing between self-inflicted and spontaneous hair loss, but reports no new results.

This article discusses the diagnostic approach to focal alopecia in dogs, focusing on distinguishing between pruritic skin disease and inflammatory or non-inflammatory causes; it presents no new experimental results.

This study suggests that the action of minoxidil in stimulating hair growth likely occurs at the follicular dermal papilla, though it does not induce new follicle formation.

This review discusses various noninflammatory alopecias in horses, particularly alopecia areata, and reports no new treatment results, emphasizing the need for differential diagnosis through examination and biopsy.

Long-term use of minoxidil may cause hair follicles to transform into noticeable terminal hairs, leading to trichostasis spinulosa.

This article describes various hair and scalp examination techniques, including noninvasive, semi-invasive, and invasive methods, noting that trichoscopy is a simple, well-accepted, noninvasive technique for evaluating hair loss patients and monitoring treatment.

This study found that trichoscopic examination can effectively differentiate between alopecia areata and trichotillomania, as specific features such as black dots and exclamation marks favor alopecia areata while hair breaking at various lengths and several unique patterns are exclusive to trichotillomania.

In this study, trichoscopic examination revealed that variations in hair diameter were more common in certain types of alopecia affecting the frontal scalp, suggesting the importance of evaluating the entire scalp for accurate diagnoses, although limitations include a single center design and small sample size.

This study reported that Asian patients have few racial differences in trichoscopy compared to Caucasian patients, except for certain features like greater mean hair diameter and masking effects by normal skin color.

This study found that Trichoscope can effectively reveal clinical features of alopecia areata and androgenic alopecia, making it a useful tool for diagnosis and monitoring.

This study reported that trichoscopy is a more effective diagnostic tool than the trichogram for early diagnosis of FAGA, regardless of hair shaft diversity cut-off levels.

This study identified specific trichoscopic features in patients with androgenetic alopecia and telogen effluvium, highlighting differences in hair shaft diameter variation between fronto-temporal and occipital areas.

This chapter reviews trichoscopic criteria and diagnostic features for various hair and scalp conditions, emphasizing their utility in non-invasive diagnosis, but reports no new clinical results.

This study suggests that trichoscopy with a handheld dermatoscope may help differentiate temporal triangular alopecia from other localized alopecia by identifying specific hair features.

This study found that most hair shaft abnormalities can be accurately diagnosed using a handheld dermoscope in a clinical setting.

This abstract provides no results; it is a website notification about cookies and general access to JAMA content.