8 citations
,
January 2016 in “Journal of fiber science and technology” This study found that cysteic acid generation during hair bleaching is diffusion-controlled, increasing with the square root of bleaching time, in both cuticles and cortex of human hair fibers.
January 2025 in “Regenerative Biomaterials” In this study, a new pH-responsive hydrogel composed of polyvinyl alcohol and boric acid was found to release salvianolic acid B effectively, reducing excessive scar formation and enhancing tissue regeneration during early-stage wound healing.
April 2026 in “Lithuanian University of Health Sciences” In this study, cinnamic acid in solution form showed strong antifungal activity against Microsporum canis, but when incorporated into hydrogels, the acid's diffusion and resulting antifungal performance decreased, though it maintained effectiveness for potential prolonged exposure.
January 2023 in “Minds at UW (University of Wisconsin)” This study suggests that while DI water significantly impacts hair, the effects of citric acid, hydrogen peroxide, and sodium chloride in shampoo on hair remain unclear, requiring further investigation.
9 citations
,
June 1947 in “Analytical Chemistry” Cold waving solutions quickly reduce cystine to cysteine in hair.
1 citations
,
April 2021 in “Han'gug miyong haghoeji/Journal of the Korean society of cosmetology” In this study, researchers found that using 0.75% aspartic acid as an intermediate agent for a permanent wave improved wave formation and retention compared to a control in virgin hair, also reducing cuticle damage and maintaining tensile strength.
20 citations
,
March 2020 in “International Journal of Biological Macromolecules” Lower acetylation makes chitin nanofibers thinner and more suitable for various uses.
March 2010 in “International Journal of Cosmetic Science” This study found that oxidative treatment with peracetic acid dissociates some disulfide bonds in human hair fibers while maintaining the crystalline structure, suggesting different mechanisms stabilize different regions of intermediate filaments.
January 2023 in “Fashion and textiles” This study found that hair dyed with anionic basic hair dye lost more color after shampooing compared to cationic and nonionic dyes, with alkaline shampoo increasing this effect.
3 citations
,
November 2022 in “Frontiers in Oncology” This review discusses the role of melanin synthesis in melanoma, focusing on how melanosomal pH might regulate melanin production, and reports no new results.
December 2025 in “Biopolymers” 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.
21 citations
,
June 1991 in “Journal of Inherited Metabolic Disease” This case report observed that a selenium-deficient diet in a child with propionic acidaemia led to macrocytosis and hair abnormalities, which improved with selenium supplementation.
2 citations
,
February 2004 in “Biopolymers” This study found that 4-(4-Phenoxybenzoyl)benzoic acid derivatives may act as antioxidants by scavenging certain reactive oxygen species but exhibit prooxidant behavior under specific conditions.
April 2024 in “JMR. Journal of molecular recognition/Journal of molecular recognition” This study found that hydrophilic carbon dots (Lys-CA-CDs) induced bovine serum albumin to form more wormlike fibrils, while inhibiting hen egg white lysozyme from forming hair-like fibrils.
7 citations
,
February 1998 in “Polymer journal” This study found that the stability of the coiled-coil structure in human hair keratin is maintained by ion-pairing and hydrophobic interactions, which are disrupted as pH approaches 7.0.
3 citations
,
May 2020 in “Acta pharmaceutica” The researchers reported that protocatechuic acid reduced melanin synthesis and enhanced antioxidant activity in cultured human hair follicle melanocytes, indicating potential for skin whitening applications.
7 citations
,
September 2024 in “Applied Microbiology and Biotechnology” In this study, researchers observed that Malassezia species show different lipid metabolism and growth patterns depending on pH, with slightly acidic conditions promoting beneficial lipid bio-conversion for skin health, while neutral pH resulted in lower growth and lipid content, potentially negatively impacting the skin.
12 citations
,
November 2019 in “South African Medical Journal” This study found that the pH levels of relaxers tested were corrosive to the skin and may contribute to alopecia in females with afro-textured hair.
May 2024 in “Physiologia Plantarum” In this study, Bacillus subtilis strain ALC_02 was observed to enhance phosphorus acquisition in phosphorus-limited dwarf tomato plants by promoting root and root hair growth, with potential implications for developing effective bacterial P biofertilizers.
51 citations
,
January 2014 in “International journal of trichology” 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.
3 citations
,
December 1975 in “PubMed” This study found that acid and alkaline phosphatases serve different functions in Beagle dog skin, with ALP primarily involved in growth processes and ACP in phospholipid breakdown.
7 citations
,
February 2024 in “ACS Applied Materials & Interfaces” This study found that PEGylated Ag₂S-ZnS@TGA-AA heteronanostructures, activated by light exposure, showed synergistic antibacterial effects against multidrug-resistant bacteria, significantly accelerating the healing of MRSA-infected wounds in comparison to untreated wounds.
June 2021 in “Clinical neuropsychopharmacology and therapeutics” This paper reviews the hair color changes associated with valproic acid treatment, noting only a few reported instances of bleaching or darkening, and reports no new findings.
September 2010 in “International Journal of Cosmetic Science” This study describes a microfluorometric method to quantify lipid removal and reattachment on human hair during light exposure and chemical treatments, altering hair surface properties from hydrophobic to hydrophilic.
12 citations
,
November 2014 in “Bioscience, Biotechnology, and Biochemistry” In this study, the researchers successfully increased dipicolinic acid production in Bacillus subtilis by genetically modifying the spoVF operon, achieving a significant productivity improvement in the culture medium.
8 citations
,
July 2018 in “Analytical sciences” This study reported that derivatization with 5-butylpicolinic acid improved the sensitivity for detecting testosterone and DHT in saliva using LC-ESI-MS/MS, with minimal interference from the saliva matrix.
September 2024 in “World Journal of Clinical Oncology” Chemotherapy with docetaxel and cisplatin can cause severe low potassium, requiring careful monitoring and treatment.
18 citations
,
October 2022 in “JCI Insight” This study found that altered amino acid metabolism, specifically involving glutamic and aspartic acids, promotes neurovascular reactivity in rosacea, suggesting a potential metabolic target for treatment.
December 2025 in “Universal library of medical and health sciences.” This study analyzes contemporary theories and practices to understand key factors influencing the development of the examined phenomenon, proposing trends and practical applications for researchers and practitioners, while acknowledging study limitations and suggesting future research directions.
February 2026 in “Journal of Microbiology and Biotechnology” This study reported that abietic acid, derived from pine rosin, showed antimicrobial effects and reduced biofilm biomass in laboratory tests against microorganisms like Staphylococcus aureus and Candida albicans, suggesting potential further applications for skin infections.