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This review discusses the complexities and uncertainties in the pathways and mechanisms for disulfide bond formation in multicellular organisms and reports no new experimental findings.

This review discusses the mechanisms by which sunlight exposure aggravates hair aging and highlights the role of hair pigments in providing photochemical protection, reporting no new results.

This study found that a shampoo containing quaternized wheat protein hydrolysate can effectively improve hair recovery by smoothing and compacting damaged hair surfaces, thanks to modifications that enhance protein adherence and disulfide bond formation at pH levels typical in hair care products.

This study found that Caucasian hair is destroyed more easily than Asian hair when stretched, as indicated by changes in secondary structure, disulfide bond breakage, and physical disintegration.

This study found that the alkaline degradation process of hair keratin using nucleophilic reagents led to different proportions of reaction products compared to wool, particularly more lanthionine and lysinoalanine residues.

This review discusses the protective and reparative properties of chitin nanofibrils on hair structure and reports no clinical results; the authors suggest chitin-based products may aid in hair regrowth.

This study found that the moisture sorption and desorption process can differentiate between cosmetic treatments of hair and provide insights into hair fibre structure changes, with bleaching causing greater symmetry breaking than perming.

This study found that the weak tensile strength of pili torti hair may result from loose keratin intermediate filaments due to abnormalities in disulfide bonds.

This study verified that a new straightening process involving a flat iron, ammonium thioglycolate, and hydrogen peroxide may permanently straighten wavy hair by eliminating disulfide bond distortions.

In this study, treating hair with thioglycolic acid was found to alter disulfide bond patterns in keratin-associated proteins, shifting them from an ellipsoidal to a near-spherical shape.

This study identified neprilysin as a potential target of the pharmacological agent arteannuin, which may guide future research into its clinical applications, although experimental verification is needed.

This study found that the carbohydrate-based excipient β-cyclodextrin forms a stable inclusion complex with the active ingredient of Minoxicapil®, potentially enhancing its formulation for hair-loss treatment, and in vitro assays suggest improved proliferation of DPC cells, supporting its use in topical treatments.

In this study, researchers observed that using an Avena strigosa seed extract on chemically damaged hair significantly improved hair properties, including strength, gloss, and surface quality, by reinforcing keratin bonding and sealing cuticle damage.

This narrative review outlines the biological costs of hair extensions, such as traction leading to hair loss and scalp issues, and suggests a prevention-focused model involving risk assessment, surveillance, and tiered therapies to minimize alopecia risk and maintain scalp health.

In this study, researchers found that ligand homodimerization controls the receptor binding specificity of the FGF9 subfamily, preventing off-target activation of FGFR "b" isoforms.

This review summarizes the roles of PDGF and its receptors in cell development and wound healing, reporting no new research findings; the authors emphasize PDGF's diverse biological functions.

This molecular docking study reported that danoprevir, remdesivir, and saridegib exhibit stronger binding affinities to the main protease of SARS-CoV-2 than the control, suggesting their potential as inhibitors of the virus's replication process.

This study suggests that TGase 3 may contribute to hair fiber scaffolding by forming specific isopeptide bonds between keratin intermediate filaments and keratin-associated proteins.

This study describes Hg(OTf)2 as a new and efficient catalyst for various organic synthesis reactions, including alkyne hydration and C–C bond forming cyclizations.

St John’s Wort can change how finasteride works in the body.

This study found that astrotactin-2 undergoes unique intramembrane proteolysis during maturation, revealing specific transmembrane topologies and substrate sequence requirements for cleavage.

This review examines mechanical and chemical causes of hair fiber adhesion failure and fracture patterns in the cell membrane complex, but presents no new experimental results.

This study found that St. John's wort treatment for two weeks induced finasteride metabolism and reduced its plasma exposure in healthy men.

This study found that chemically treated hair, particularly when subjected to both acid straightening and bleaching, experiences more significant structural damage when exposed to heat, highlighting key changes in both the internal and surface components of hair fibers.

St. John’s wort changes how finasteride works in the body, possibly affecting its effectiveness.

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

In this study, carboxymethylalanyl disulfide keratin was shown to effectively prevent hair damage during repeated bleaching and permanent waving treatments.

This study on Indian dromedary camel breeds investigated the KRTAP7 protein, finding all four breeds shared an identical gene sequence, with 13 phosphorylation and glycosylation sites influencing hair characteristics, alongside predicted interactions with other biosynthesis-related proteins.