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This study found that platelet-rich plasma therapy significantly improved hair density, diameter, and reduced inflammation in androgenetic alopecia patients compared to placebo, though individual responses varied.

This study found that low-dose oral minoxidil (≤5 mg/day) effectively increased hair number and diameter in men and women with androgenetic alopecia, and was generally well-tolerated with mostly mild adverse effects, although serious complications were rare and associated mainly with pre-existing heart conditions.

In this study, researchers reported significant improvements in hair follicle diameter, thickness, and reduced hair root gap after treating male pattern hair loss with a regimen of Prachanna, Chitrakadi lepa, and Jeevamrutham lehyam over four months.

This study observed that feeding ewes a water-soluble complex of fatty acids increased primary hair follicle bulb diameter and mitotic activity, suggesting a positive correlation with wool growth.

This study found that combining microneedling with 5% Minoxidil and Finasteride significantly improved hair density and hair shaft diameter in males with androgenetic alopecia, outperforming Minoxidil alone or in combination with Finasteride, although changes in hormonal levels and trace elements were not significant.

The study found that combining a 655nm low-level laser helmet with 2% minoxidil resulted in better improvement in hair diameter and intermediate hair enlargement at the midscalp among Chinese women with FPHL.

This study found that specific dermoscopic signs, such as diameter diversity of leukotrichia and Pohl-Pinkus constrictions, were associated with progressive vitiligo, and early-stage melanin synthesis was impaired in vitiligo-associated leukotrichia.

This study observed that in Assam Hill Goats, the primary hair follicles had larger diameters and more structural associations compared to secondary follicles, especially in ruminant-age groups.

In this study, the HairCheck device was reported to accurately assess changes in hair density and diameter, suggesting its usefulness in monitoring alopecia progression and treatment response.

This study reports that a prototype device may accurately measure changes in hair quantity, diameter, and density in patients with balding by assessing the cross-sectional area of hair bundles.

This study found that treating androgenetic alopecia patients with microneedle-delivered GFC containing FGF5s and NMN increased hair density and diameter compared to normal saline.

This study found that 1550-nm Er:Glass fractional laser treatment significantly increased hair density and shaft diameter in patients with androgenetic alopecia, though the mechanism may not involve Wnt10A or IGF-1 expression.

This study found that a 12-week topical application of bimatoprost 0.03% significantly increased the diameter of vellus hairs in patients with androgenic alopecia.

This study found that spironolactone, flutamide, and finasteride are similarly effective in reducing hair diameter and Ferriman-Gallwey scores in women with hirsutism over a 6-month treatment period.

This study found that both human and rat dermal papilla spheroids can induce hair follicle neogenesis, but larger spheroids increase inductivity without significantly affecting hair fiber diameter.

This study found that in hirsute women, daily treatment with 200 mg spironolactone significantly reduced hair growth rates and hair shaft diameters on various body areas over 12 months.

This study found that dermoscopy can be a useful tool for diagnosing androgenetic alopecia, particularly in determining hair diameter diversity as an essential feature in Asian populations.

In a 24-week randomized trial, this study found that the RAMACAP laser helmet significantly increased hair density and diameter in androgenetic alopecia patients compared to a sham device, although limitations included a small sample size and potential issues with the control used.

This study found that both finasteride and flutamide effectively reduced hirsutism, with flutamide being more effective than finasteride in decreasing hirsutism scores and hair diameter over 12 months.

This study suggests that transplanting hair to new nonscalp sites affects their growth and survival rates, though the hair diameter remains consistent.

This study found that flutamide, finasteride, ketoconazole, and EE-CPA all significantly reduced hirsutism scores, hair diameter, and hair growth rate in women with hirsutism over 12 months.

In this study, applying FGF-2-containing dalteparin/protamine nanoparticles to the scalp was associated with a significant increase in hair diameter over six months among participants with thin hair.

In this study, researchers found that WNT activation influenced FGF expression in human scalp-derived fibroblasts, with mouse model results showing FGF9 increased hair follicle number and diameter, while FGF7 reduced diameter.

This study examined the morphological variations of terminal hair from different body regions of a Caucasian male, finding notable differences in diameter and features like "steak-boning" in specific hair types.

This study found that platelet-rich plasma combined with other hair restoration therapies significantly increased hair density in patients with androgenetic alopecia, though it did not statistically affect hair shaft diameter.

This study found that the HairCheck® device, demonstrating high correlation between its Hair Mass Index and hair characteristics such as strand number and diameter, may be an effective tool for assessing hair mass changes in alopecia patients.

This study found that polymorphisms in the KAP8.1 gene were significantly associated with cashmere weight, length, and guard hair length in Chinese Inner Mongolian Cashmere goats, but not with fibre diameter.

This study examined the Spanish Merino breed's wool quality, identifying 74 genetic variants linked to key wool traits like fiber diameter and staple length, which could help restore the breed's potential for producing high-quality wool.

This study reveals that long non-coding RNAs influence cashmere fiber traits in goats by interacting with target genes involved in pathways affecting fiber diameter and color.

In this study, the researchers found that transplanted hair follicles undergo significant morphological changes, including a thickened dermal sheath and increased hair shaft diameter, which are associated with altered follicular vascularization.