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This study found that in the Thai population, hair density varies by scalp location and decreases with age, and that Asians generally have lower hair density compared to Caucasian and African populations.

This study found that Korean men with androgenetic alopecia have lower hair density and a higher proportion of single-hair units compared to normal adult males.

In this study, TrichoScan characteristics, particularly hair density and terminal hair percentage in the midscalp, were found to predictively classify female pattern hair loss in a Chinese population.

This study found that quantitative trichoscopy is a simple and effective method for determining hair density and thickness in Egyptians, establishing baseline values for clinical hair loss investigations.

In this study, researchers found that using a handheld digital microscope, hair diameter was a better determinant of perceived alopecia severity in androgenetic alopecia than hair density.

Hair loss is due to thinner hairs, not less hairs; hair diameter indicates balding progression and treatment effectiveness.

This study found that daily use of 1% pyrithione zinc shampoo modestly improved hair growth over 26 weeks, although these effects were less than those of 5% minoxidil.

This study reported that two male patients with diffuse unpatterned alopecia exhibited donor-area involvement in both the vertex and occiput, challenging the assumption of occipital stability for hair transplantation, and showed partial improvement following treatment with oral finasteride and topical minoxidil.

This paper documents a case of natural reversal of moderate-to-severe androgenetic alopecia without medical intervention, but emphasizes it is an individual observation not generalizable to broader populations.

In this documented case report, the researcher detailed a natural reversal of moderate-to-severe androgenetic alopecia without any medical interventions by systematically observing and analyzing hair regrowth over time, emphasizing that these findings are purely from personal practice and not applicable to broader populations.

In this study, female pattern hair loss in Chinese Han patients was characterized by decreased hair density and shaft diameter, with minor gender differences and the vertex most affected.

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.

In this study, injections of PRP and MZT products significantly improved hair thickness, density, and count in AGA patients over six months, with variability observed in the extent of improvement between different formulations.

Male hair loss is mainly due to thinner hair, not less hair.

In this study, researchers observed the patterns of hair distribution and scalp anatomy in Chinese young adult males, finding significant variations in hairline shape, hair density, and follicular unit structure.

This study captured digital images of hair regions in healthy individuals and patients with androgenetic alopecia to analyze and compare the number of follicular units and hairs using software.

This study found that topical cetirizine increased hair shaft thickness and improved clinical outcomes from the patients' perspective in female androgenetic alopecia compared to minoxidil alone, with similar side effect profiles.

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.

This study found that a topical solution combining 0.25% finasteride with 3% minoxidil significantly improved hair growth, as measured by hair density, diameter, and global assessment, in men with androgenetic alopecia, compared to 3% minoxidil alone, over 24 weeks without systemic adverse effects reported.

This article discusses patient selection and procedural design for hair transplant surgery without reporting new clinical results; it also considers how hair transplant designs can align with various hairstyles.

This study found that the vertex/occiput ratios of hair density and diameter in prepubertal children may serve as reference values to identify androgenetic alopecia with high probability.

This study reports that quantitative trichoscopy, while noninvasive and convenient, provides less accurate hair density data compared to invasive histopathologic examination, which was demonstrated in a sample of adult Chinese individuals without alopecia.

This study found that topical minoxidil 5% remains the most common treatment for androgenic alopecia due to its high tolerability and patient satisfaction, but topical sildenafil 2% shows promise as an alternative, especially with positive hair thickness outcomes in certain areas.

This study found that combining PRP with topical minoxidil or finasteride significantly improved hair density and thickness, with patient satisfaction highest for multiple treatment combinations and longer durations.

In this study, using a shampoo with Morus alba root extract over 12 weeks increased hair density and shaft thickness in patients with mild to moderate non-scarring alopecia, with both investigators and participants noting visible improvements and moderate satisfaction.

This study introduced the BASP classification, a new system for categorizing pattern hair loss in both men and women, and applied it to analyze 2213 Korean subjects.

This study found that oral dutasteride increased hair density but not thickness in female-pattern hair loss patients, suggesting a potential mechanism involving β-catenin activity.

This study found that oral dutasteride significantly increased hair density but not thickness in women with female-pattern hair loss, and identified a mechanism involving β-catenin activation.

In this randomized clinical trial, oral minoxidil was not superior to topical minoxidil in increasing hair density in men with androgenetic alopecia over 24 weeks, though photographic analysis suggested oral minoxidil may work better on the vertex area of the scalp.

In this study, platelet-rich plasma injections improved hair density by 19.17% in men with androgenetic alopecia over six months, although results varied by alopecia pattern.