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This study found that a bio-based repair solution containing hydrolysed wool keratin, serine, and transglutaminase improved the physical and chemical properties of damaged hair, increasing its strength, flexibility, and thermal stability while offering long-lasting protection against chemical damage.

This study reviews the biology and cosmetic treatment of hair, emphasizing future advancements in safer, more effective procedures to meet consumer needs for hair care.

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 experimental study, researchers found that using aluminum foil in hair bleaching significantly improves lightness and color uniformity compared to not using foil, indicating a more effective technique for achieving optimal hair coloring results.

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.

This study observed that the addition of Cuticapil Stem Hair Serum to standard care significantly improved hair growth and reduced hair shedding in patients with androgenetic alopecia, demonstrating superior efficacy compared to standard care alone without any reported adverse events.

In this study, researchers observed that even a single session of hair dyeing can damage hair fibers, with significant worsening of mechanical properties and protein composition after three or more consecutive treatments, emphasizing the need to consider the cumulative impacts of dyeing on hair health.

This case report underlines the importance of considering alternative diagnoses like ovarian steroid cell tumors in adolescent females with PCOS-like symptoms when standard treatments fail, highlighting the need for thorough evaluation and early intervention.

This study examines the role of nanotechnology in cosmetics, highlighting its benefits in improving ingredient solubility and stability, but also noting challenges such as cost, shelf life, and safety concerns, along with regulatory complexities, particularly in harmonizing global legislation.

This randomized controlled trial found that consuming *Gynostemma pentaphyllum* extract significantly improved hair elasticity, density, and diameter over 24 weeks without severe adverse events, suggesting it as a safe functional food ingredient for hair health improvement.

This study found that a refined wash test can effectively differentiate shedding hair characteristics among normal individuals, and patients with androgenetic alopecia or telogen effluvium, aiding in diagnosis and monitoring.

The researchers reported that certain physical characteristics of hair shafts, such as length and color, may influence mtDNA read counts and degradation state when analyzed by massively parallel sequencing.

This study found that using 369LAB Lipid Bond, derived from plant oil triglycerides, can restore lipid content in damaged hair to natural levels and improve hair strength, integrity, and resilience after a single application, with benefits persisting even after discontinuation.

In this study, researchers examined juglone's potential as a restoring agent for hair keratin damaged by permanent or bleaching treatments, finding that juglone formed Michael adducts with cysteine residues, leading to a more regular hair surface as observed via IR spectroscopy and SEM analysis.

This review discusses factors affecting hair aging and the current pharmacological treatments for androgenetic alopecia, mentioning topical minoxidil and oral finasteride, but does not present new clinical findings.

This review reports on the effects of aging on hair characteristics such as pigmentation, growth, and structural properties across genders and ethnicities, highlighting the importance of scalp health and suggesting cosmetic solutions to improve the appearance of aged hair.

In this study, researchers used SEM/SDD-EDS to identify waterborne minerals like calcium and aluminum in the scalp hair cuticle of individuals using treated or untreated water for hair washing, finding that prior application of coconut oil or conditioners can prevent calcium uptake.

This study found that peroxide-rich plasma-activated water caused minimal morphological damage to hair, while nitrate-rich plasma-activated water induced significant damage, especially in porous hair types.

This review discusses how targeting apoptosis pathways in hair and skin cells can inform the development of novel therapies, but it reports no clinical findings.

This review explores how hair dyes and perms can damage hair structure and notes that while some adverse outcomes like skin irritation and allergic reactions have been reported, evidence from human studies remains inconsistent regarding potential risks, including cancer.

This research found that perming, combing, and stretching cause hair damage, leading to a significant reduction in keratin levels within a specific molecular weight range.

This study found that perming, combing, and stretching human hair lead to damage, as evidenced by a reduction in keratins with molecular weights between 67,000 to 43,000 daltons.

This study found that chemical treatments like perming, dyeing, and bleaching significantly alter amino acids and lipids in human hair, which may impact hair strength and quality.

In this study, bleaching and perming were found to significantly reduce opiate concentrations in both spiked and naturally opiate-positive human hair samples.

This article reviews innovations in hair cosmetics, focusing on esthetic procedures and products in the Indian market, and reports no new experimental findings.

This article examines the role and composition of integral hair lipids in forming a protective barrier similar to the skin's epidermal lipid layer and reports no new findings about their effects.

This study found that both everyday physical and environmental stresses, as well as chemical treatments, contributed to hair damage, with cuticle layers being more noticeably affected.

This study reports that keratin actives may protect various hair types from chemical damage, restore damaged fibers' mechanical strength, and reduce color fading.

This review discusses the lipid composition of human hair across ethnic types, effects of damage on lipid content, and associated changes with diseases, but reports no new findings; further research is needed.

Keratin film can effectively mimic human hair for testing hair damage.