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In this comprehensive review, researchers reported that macromolecules like type I collagen, keratin, and ceramides enhance hair health by improving follicular function and increasing hair density, strength, shine, and resilience, as shown in various in vitro, animal, and human studies.

In this study, researchers used transcriptome sequencing to identify 1543 differentially expressed genes between cashmere and normal goats, implicating several signaling pathways and key regulators in the distinct gene expression profiles linked to cashmere fiber production, which advances understanding of cashmere goat genetics.

This study reports that trichocyte intermediate filaments from rat vibrissae and human hair follicles may contain a hollow region at their core, suggesting unique structural properties.

This study reported that discarded squid ink was used to develop a high-performance, environmentally friendly hair dye that offers a stable deep black color, UV protection, and preserves hair structure, while showing excellent biosafety in lab tests.

In this study on Chinese Tan sheep, researchers discovered a variant of the KRTAP19-5 gene associated with decreased curvature of fine wool fibres, highlighting potential genetic markers for improving wool quality.

In this study, researchers analyzed the skin proteome of Alpine Merino sheep to identify proteins and pathways related to wool fiber diameter, finding that cyclic adenosine monophosphate and certain signaling pathways may play a role in this trait.

This review examines the chemical composition and potential health risks of hair straighteners, but it reports no new findings and emphasizes the importance of understanding hair fibre structure for safe use.

This study found that a marine-extract dietary supplement significantly reduced hair shedding and increased hair diameter in premenopausal women with subclinical hair thinning or hair loss after 6 months of use.

This study found that using three-dimensional cell culture with Matrigel enhances the biological function and stemness of stem cells, leading to improved soft tissue repair and healing by activating the host microenvironment and autologous stem cells.

This study found that electronically-operated pneumatic injections for administering a peptide-hyaluronic acid combination were well tolerated and led to significant improvement in hair density and thickness for men with androgenic alopecia over six months, though the exact mechanism remains uncertain.

This abstract does not provide any specific results or findings but describes male androgenic alopecia as a progressive and psychologically distressing hair-loss disorder involving hair follicle miniaturization.

This review discusses the aging-related changes in hair properties, their impact on styling, and potential interventions, without providing new clinical results.

In this case report, combining iontophoresis with exosomes was associated with increased hair density, improved hair quality, and reduced scalp inflammation in patients with female androgenetic alopecia.

This study consolidates information on the unique structural and functional biology of Indian hair, reporting distinct scalp microbial ecology and trichoscopic parameters, which are important for diagnosing and treating hair conditions in Indian populations.

This review examines the pH levels of various shampoos and reports no new clinical results, highlighting the potential importance of labeling pH values on shampoo packaging for hair and scalp health.

In this animal study, administering testosterone alongside a 5α-reductase inhibitor counteracted testosterone's effects on prostate enlargement while preserving its beneficial effects on muscle and bone.

This study demonstrated that human hair follicle stem cells can be efficiently differentiated into endothelial-like cells using VEGF and bFGF, suggesting their potential as a novel cell source for vascular tissue engineering.

This study found that sphinganine may improve scalp health, hair quality, and reduce hair loss in males, potentially due to increased antimicrobial peptide levels and inhibition of 5-α-reductase.

Genetic studies on hair traits can improve understanding of health and disease.

The laser therapy device effectively increased hair growth in people with androgenetic alopecia.

In this study, adults with mild-to-moderate hair damage taking GPVGPS Collagen® daily for 24 weeks showed significant improvements in hair luster, strength, thickness, and density compared to placebo, with no safety concerns reported.

This study involved selecting patients with specific types of alopecia for treatment but does not report clinical outcomes.

In this study, combining photobiomodulation therapy and pulsed electromagnetic field therapy over 24 weeks significantly increased hair density in androgenetic alopecia patients compared to a sham device control, with minimal side effects reported.

This study investigated the effects of GFC with FGF5s and NMN at a depth of 0.8 mm using a microneedle for treating hair loss, but the abstract provides no measurable results.

This study outlines a hair regrowth treatment targeting hair follicle stem cells, 5-alpha reductase pathway, and microinflammation using PDGF and VEGF, but reports no clinical results.

This review examines the potential of plant-derived exosome-like nanovesicles in dermatology, highlighting their bioactive properties and discussing challenges to their clinical application, but does not provide new clinical results.

This study examined the sensory innervation of hair follicles in the furry skin of rat hindlimbs, finding significant differences among hair types in their innervation patterns and densities.

This study found that combining electrotherapy with aromatherapy led to increased hair shaft thickness in men with androgenetic alopecia, although no changes in the scalp were observed.

The device improved hair growth and thickness in men without side effects.