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This study found that vitamin D supplementation in diets of Rex rabbits improved hair follicle development and fatty acid metabolism, with 1400–2100 IU/kg proving most effective for hair density and 2800 IU/kg increasing hair length.

This study found that a combination of probiotic strains of Lactiplantibacillus administered over 16 weeks reduced the number and density of telogen hairs in individuals with androgenic alopecia, while increasing the abundance of Lactobacillus in their gut microbiota.

This review outlines the steps of contemporary hair transplantation surgery, including the roles of medications and nonsurgical options, but it reports no new clinical findings.

This article discusses the concept of using a centralized forelock presented by Manny Marritt nearly 14 years ago, and reports no new clinical results.

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 a dissolvable microneedle device delivering rapamycin and epigallocatechin gallate nanoparticles significantly enhanced hair regrowth in C57BL/6 mice within 7 days, demonstrating increased hair shaft growth and follicle density with minimal inflammation compared to untreated mice.

This article discusses techniques for correcting hairline deformities after face lift procedures using follicular unit implantation, but it reports no clinical results.

This study found that certain off-label topical therapies, including prostaglandin analogs and polyphenols, improved hair restoration in men with androgenetic alopecia over placebo in the short term, though long-term effects are unknown.

This study used TMT-based quantitative proteomics to analyze the development of secondary hair follicles in fetal sheep, revealing increased follicle density and key proteins involved, such as COL1A1 and THBS4, indicating their potential role in wool quality traits.

This study found that systemic ovalbumin–aluminum sensitization followed by cutaneous challenge in mice induced thermal hyperalgesia, increased spinal cord gliosis, and sprouting of nociceptive fibers, along with elevated mast cell and nerve profile densities in the skin compared to controls.

This study found that applying an ethanol extract of Prasiola japonica improved hair regrowth, length, and follicular density in testosterone-induced hair loss conditions in mice, while also promoting dermal papilla cell proliferation and reducing dihydrotestosterone production, though effects were less pronounced than those of minoxidil.

In this study, DOP treatment improved hair regrowth in androgenetic alopecia by altering local steroid metabolism and follicular morphology.

This study observed that follicular unit extraction combined with direct hair implantation successfully restored hair in a patient with multifocal post-burn alopecia, achieving nearly natural growth density and patient satisfaction.

This literature review reports that certain herbal remedies, such as rosemary, green tea, and ginseng, have shown promise in promoting hair growth and improving hair density, though variability and study design limitations highlight the need for more rigorous research.

This study found that exosomes derived from mesenchymal stem cells primed with rapamycin significantly enhanced hair regrowth, hair density, and hair follicle development in depilation-induced mice compared to controls, suggesting a potential therapeutic approach for hair loss.

This study highlighted the potential of iron chelators, deferoxamine and deferiprone, to improve hair density, thickness, and elasticity and reduce hair loss by up to 66.8% over six months in individuals with autoimmune alopecia, suggesting they may offer a promising therapeutic option.

This study found that, in female patients with pattern hair loss, injections of adipose-derived stem cells increased hair density and thickness, reduced perifollicular inflammation, and enhanced markers associated with hair cycle regeneration.

In this study, maternal melatonin implantation in pregnant rabbits reduced hair follicle cell apoptosis and increased hair follicle density in their neonatal offspring, suggesting a beneficial impact on hair follicle development mediated through specific molecular pathways.

In this study of Zhexi Angora rabbits, researchers found that the fine-wool group exhibited lower fiber diameters and a higher hair follicle density than the coarse-wool group, and they identified key candidate genes potentially regulating wool quality through RNA-seq and genome resequencing techniques.

In this study involving genetically modified rats, researchers observed that specific mutations in the vitamin D receptor affect calcium levels and bone formation, emphasizing the receptor's role in maintaining healthy bone density and its importance in regulating hair cycle and skin health.

In this case report, a 35-year-old man with androgenetic alopecia showed significant improvement in hair thickness and density after six months of conservative therapy with topical minoxidil, oral finasteride, and a gel with oligopeptides, caffeine, and taurine.

This study explains surgical techniques for hair transplantation using the sharp implanter method, emphasizing 11 key principles that optimize efficiency and precision, and reports high graft survival and natural hair density when these principles are followed.

This study found that short-day photoperiod treatment in Shanbei white cashmere goats enhanced cashmere growth, increased secondary follicle density, and altered hormone levels and gene expression related to hair follicle development.

In this study, high expression of S100A4 in glioblastoma was associated with worse patient survival and promoted tumor progression by enhancing pro-tumorigenic vascular functions.

This case report describes a 42-year-old woman with atopic dermatitis, whose alopecia areata reactivated rapidly after starting dupilumab, possibly indicating an unrecognized adverse effect in AD patients.

This systematic review found that light and laser therapies, including excimer and erbium-glass lasers, generally increase hair density and diameter in various types of alopecia, with particularly notable effects in androgenic alopecia but limited efficacy in telogen effluvium.

This study observed that densely packed follicular unit grafts using the lateral slit technique have high growth rates, even at 72 grafts/cm², contradicting previous findings with older methods.

This article outlines the rationale and design of the Rotterdam Study, summarizes its major findings, and updates its objectives and methods; it reports no new research results.

This study found that PCL-based nanofiber scaffolds enhanced cell proliferation and extracellular matrix deposition, suggesting they show promise as a cell delivery system for improving skin wound healing.

This article reviews emerging treatments for androgenetic alopecia, including topical 5-alpha-reductase inhibitors and prostaglandin modulators, but reports no clinical results and calls for further efficacy evidence, especially for PRP.