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In this study of 20 female patients with Covid-19-induced persistent Telogen Effluvium, intra-dermal QR678 Neo® treatments led to significant reductions in hair fall and increases in hair growth and density, sustained even post-therapy.

This study demonstrated that novel cryomicroneedles loaded with hair follicle organoids (cryoMN@HFOs) can effectively deliver and develop into functional hair follicles after intradermal transplantation in animal experiments, suggesting promising potential for human hair follicle reconstruction.

In this case study, the combination of microneedling and intradermal therapy was observed to effectively stimulate hair growth and improve hair density in a menopausal woman with androgenetic alopecia, resulting in enhanced self-esteem and cosmetic satisfaction.

This research consisted of a Phase I/II study on androgenetic alopecia where male participants received intradermal injections of HSC, with hair growth efficacy assessed through Trichoscan imaging, although no new clinical results are reported.

In this study, researchers developed a new self-administered finasteride delivery system using powder-carrying microneedles that improved hair growth efficacy and addressed safety concerns compared to topical finasteride gel by allowing sustained intradermal release of the drug for three days with a single application.

This study found that combining MSM with MAP significantly enhanced hair growth in mice, comparable to or better than minoxidil, due to increased intradermal retention of MAP.

This review discusses emerging therapies for androgenetic alopecia, including topical finasteride, oral minoxidil, and intradermal dutasteride, and reports no clinical results; the authors highlight changes in treatment approaches.

In this study, an infection model using rabbits was developed for dermatophytosis by inoculating macroconidia of Microsporum species, showing that direct intradermal application effectively progressed to the skin invasion phase and highlighted the correlation between severity of symptoms and duration post-inoculation.

In this study, two female patients with severe, treatment-resistant alopecia areata showed significant hair regrowth after a single session of intradermal administration of adipose tissue–derived exosomes, without experiencing adverse events, suggesting a promising therapeutic strategy for refractory cases.

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, adding platelet-rich plasma to minoxidil and finasteride treatment for patterned hair loss improved hair outcomes with minimal side effects compared to using minoxidil and finasteride alone.

This study found that recombinant human HGF/SF injections altered hair follicle growth cycles and mildly promoted hair elongation in mice, depending on their hair cycle stage.

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.

ACTH promotes hair growth in mink, but α-MSH does not.

This case report describes a woman who experienced frontal edema after topical minoxidil application following mesotherapy, noting that excessive absorption of minoxidil may cause localized vasodilatory side effects.

This single-patient case study reported promising results for severe, corticosteroid-resistant alopecia areata, with treatment using exosomes derived from mesenchymal stromal cells leading to almost complete hair regrowth in 12 weeks and favorable changes in inflammatory markers, suggesting potential for further investigation.

This case report highlights significant hair regrowth in a Malaysian woman with localized alopecia areata after intralesional triamcinolone acetonide treatment at a concentration of 5 mg/mL.

In this case study, a 14-year-old boy with treatment-resistant diffuse alopecia areata achieved complete hair regrowth following three monthly sessions of microneedling combined with injections of triamcinolone, dutasteride, and synthetic exosomes, suggesting that exosome-based therapy could be a promising alternative for managing refractory autoimmune alopecia.

This study reports that a novel multimodal approach, combining tattoo machine–assisted drug delivery of hair loss treatments with oral and topical medications, may enhance hair density and thickness in androgenetic alopecia patients, though larger controlled studies are needed to confirm these early findings.

PRP treatment improved skin pigmentation and appearance in facial lichen planus pigmentosus.

This study summarizes the therapeutic use of mesotherapy using vitamins, trace elements, and stem cell extracts for treating alopecia, noting its effectiveness in addressing both androgenetic alopecia and telogen effluvium as demonstrated in various clinical trials.

A 72-year-old man was diagnosed with a rare skin form of Rosai-Dorfman disease after years of misdiagnosis.

In this study, carotene injected into the skin was converted into vitamin A by sebaceous gland cells, where it was not normally detectable.

In this study, injecting Nε-(carboxymethyl) lysine into skin tissue weakened hair shaft and follicle formation, likely by inhibiting cell proliferation and migration needed for hair follicle morphogenesis.

This experimental study found no significant difference in hair follicle characteristics after short-term treatment with autologous platelet-rich plasma in individuals with androgenic alopecia compared to placebo.

This study found that administering an adenovirus vector to increase Sonic hedgehog gene expression in mouse skin accelerated the transition of hair follicles into the growth phase, promoting hair growth.

This review discusses the potential of microneedles to enhance transdermal drug delivery by expanding the range of deliverable drugs, highlighting fabrication methods, material choices, and applications, but notes existing challenges with sustained delivery, cost-effectiveness, and large-scale production.

This study found HLA and beta 2-microglobulin antigens in various skin structures, with specific localization patterns in keratinocytes and hair follicle components, but not in eccrine or apocrine glands.

This review discusses allergic reactions to pollen in dogs, cats, and horses and suggests that these animals' spontaneous allergies could serve as models for translational clinical studies applicable to human allergies.

This study found that lymphatic vessels promote hair follicle growth in mice and may represent new therapeutic targets for hair loss conditions.