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Hair straightening methods have advanced to improve effectiveness and reduce damage, but still rely on heat and chemicals.

This study demonstrates that spatially resolved IR and Raman imaging can effectively reveal the molecular structure and composition of untreated human hair, providing insights into its chemistry and structural integrity.

This study found that permanent waving treatment induces structural changes in the cortex proteins of white human hair, significantly reducing its tensile strength without altering the S-S band intensity.

The book discussed in this abstract is a comprehensive guide to hair analysis, detailing the latest methods and applications across various fields such as toxicology and drug monitoring, designed for both newcomers and experts in the field.

The document explains how hair is studied in forensics to identify its source and its role in criminal investigations.

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 demonstrated that human hair can be coated with Fe3O4 nanoparticles, allowing it to be oriented and moved by a magnetic field, which may enhance drug delivery and hair care applications.

This study found that rebonding hair straightening treatments visibly damage the hair cuticle, causing surface erosion and cracks, as shown through Scanning Electron Microscopy analysis.

This study systematically characterized the nanomechanical properties of human hair, such as hardness and elastic modulus, across different ethnicities and treatment conditions using nanoindentation and scanning electron microscopy.

This study conducted in situ tensile loading experiments with atomic force microscopy to observe how conditioning treatments affect the tensile response of virgin, chemically damaged, and mechanically damaged Caucasian hair.

This study demonstrates that a bioinspired peptide, PepACS, can efficiently and safely perm hair by interacting with keratin's sulfhydryl group without compromising tensile strength, and it shows potential for hair repair and dyeing applications in the hair care industry.

This study explored a multidimensional approach to examine body hairs' physico-chemical properties, potentially supporting their use over scalp hairs in forensic and intoxication studies.

This study found that using an aqueous solution of AMPD in hair bleach reduced both hair damage and odor compared to ammonium hydroxide.

This study found that male and female hair specimens show structural differences, with female hair having a brown color at the distal end and smooth surface texture, while male hair is completely black and shows surface irregularities; these differences may aid forensic analysis.

In this study, incorporating a novel amino acid compound into a hair-straightening formulation improved humidity-resistant straightening and enhanced the surface and mechanical properties of hair fibers, including increased bending stiffness, reduced friction, and better shape retention under high temperature and humidity conditions.

This study found that different polypeptides, including KP peptide and hydrolyzed keratin, can improve the mechanical properties of damaged hair under varying conditions, with reduction environments and cysteine content influencing their effectiveness.

This study developed a biocompatible hair-dyeing technology using a dark polyphenol complex, which demonstrated effective hair coating, improved mechanical strength, and strong antioxidant properties while maintaining high cell viability.

In this study, researchers using a UVB-induced mouse model identified the gene COL7A1 as a novel marker for hair luster, finding that minoxidil, caffeine, and biotin effectively restored its expression, indicating potential therapeutic strategies.

This study concluded that bleach treatment partly transforms the hydrophobic top layer of human hair cuticles into a hydrophilic surface with clustered cysteic acid, visualized at the nano-scale using dynamic Chemical Force Microscopy.

This paper suggests that coating hair with drug-loaded nanotubes may offer durable drug delivery and color applications, with potential for both human and veterinary uses.

This study reported that a new coating made with delaminated Ti₃C₂ MXene nano-sheets and a tea-derived compound effectively protects hair keratin from damage by providing UV screening, thermal dissipation, and antioxidation, while also enhancing mechanical strength and restoring wettability.

In this study, researchers developed an environmentally friendly hair coating from casein proteins and tannic acid, enhancing the tensile strength of virgin Asian hair by approximately 21% compared to untreated hair, while maintaining elasticity.

The 15th-century Korean mummy's hair was well-preserved due to a protective lime-soil coating.

This study introduced a novel graphene-based hair dye that is non-reactive, non-invasive, and eliminates toxic chemicals, while providing durable color, antistatic properties, and efficient heat dissipation, even after 30 washes.

This study observed that tannic acid significantly reduced hair shedding by 56.2% over seven days in human participants when used as a coating for controlled release of active compounds to hair follicles.

This study developed a novel hair-straightening shampoo incorporating a polyphenol–inorganic sulfate redox agent, finding that it effectively straightens hair while enhancing strength and reducing damage due to its protective polyphenol coating.

This chapter reviews hair anatomy, hair shaft structure, and various cosmetic treatments that can alter or damage hair, but it presents no new research findings.

This paper reviews the complex anatomy and development of human hair and emphasizes the need to understand these processes for interpreting drug incorporation into hair, with no new clinical results reported.

This study demonstrated that in a mouse model of androgenic alopecia, PLGA-DUT/siAR@DPCM nanoparticles effectively delivered drugs to hair follicles, suppressed androgen-related targets, promoted cell proliferation, and showed significant therapeutic effects with minimal adverse effects, suggesting their potential for clinical application.

This study analyzed the nanotribological properties of various hair types and human skin, revealing differences in friction and adhesion based on ethnicity and hair condition.