January 2026 in “International Journal of Biological Macromolecules” Small KP peptide improves hair without reducing agents, while larger proteins need them for better results.
December 2025 in “Universal library of medical and health sciences.” Amino acids like arginine and cysteine protect hair during chemical treatments, keeping it strong and less brittle.
March 2025 in “The Open Dermatology Journal” Trichorrhexis nodosa is common hair breakage, often due to styling, and new treatments are being explored.
January 2024 in “Molecules (Basel. Online)” Juglone from walnut extracts may help repair damaged hair.
October 2021 in “Digital Library of Theses and Dissertations (Universidade de São Paulo)” The active ingredient improves the strength of damaged hair fibers.
September 2018 in “University of the Arts London Research Online (University of the Arts London)” L-arginine, hydrolysed keratin, and cystine-silanol copolymer can help protect hair from damage during and after bleaching.
June 2017 in “University of the Arts London Research Online (University of the Arts London)” Polymers help reduce damage and improve bleached hair when used during or after bleaching.
January 2014 in “한국미용학회지” UV-A radiation significantly damages semi-permanent dyed hair.
January 2011 in “Yearbook of Dermatology and Dermatologic Surgery” Hair relaxers are linked to reduced cystine levels and potential hair damage.
January 2011 in “대한피부과학회지” A 7-year-old girl was diagnosed with trichothiodystrophy due to low sulfur levels in her hair.
May 2010 in “International Journal of Cosmetic Science” Mercaptans make hair more prone to damage, with reduced hair being more affected than permed hair.
March 2010 in “International Journal of Cosmetic Science” Disulfide bonds affect the melting behavior of hair's crystalline structure, but hair retains some stability even after these bonds are broken.
January 2007 in “Revista del Centro Dermatológico Pascua” A 2-year-old boy was diagnosed with a rare genetic condition causing fragile hair, intellectual issues, and short stature.
Chemical treatments weaken hair's thermal stability and structure.
January 1991 in “Journal of Society of Cosmetic Chemists of Japan” Hair treatments can damage hair by changing its chemical content.
January 2014 in “Chinese Journal of Aesthetic Medicine” ChuZhiShengFaPian and Licorzine Granules effectively treat early male hair loss.
1744 citations
,
August 2006 in “The Journal of Clinical Endocrinology and Metabolism” Polycystic Ovary Syndrome should be seen mainly as a condition of excess male hormones, with a focus on this in its definition.
226 citations
,
January 2006 in “International review of cytology” Keratin-associated proteins are crucial for hair strength and structure.
76 citations
,
December 2011 in “Journal of Cell Science” Different keratin types have unique amino acid patterns that are evolutionarily conserved.
73 citations
,
June 2006 in “Animal genetics” The FGF5 gene determines hair length in dogs.
66 citations
,
August 2011 in “Parasitology Research” Mint essential oils can kill parasites that cause cystic echinococcosis, with M. pulegium oil being more effective than M. piperita oil.
62 citations
,
January 2004 in “The journal of investigative dermatology/Journal of investigative dermatology” A second domain of high sulfur KAP genes on chromosome 21q23 is crucial for hair structure.
52 citations
,
June 1981 in “International Journal of Dermatology” Oral retinoids are effective for severe skin conditions but require careful use due to side effects.
51 citations
,
January 2007 in “The journal of investigative dermatology/Journal of investigative dermatology” Scientists discovered a unique hair protein, KAP24.1, with a special structure, found only in the upper part of hair cuticles.
48 citations
,
February 2016 in “Scientific Reports” Researchers created rat liver stem cells that could help repair liver failure in rats and may be useful for studying human liver diseases.
48 citations
,
July 1993 in “The journal of investigative dermatology/Journal of investigative dermatology” Hair growth is controlled by specific gene clusters and proteins, and cysteine affects hair gene expression in sheep.
41 citations
,
September 2014 in “Journal of Pharmacy and Pharmacology” Melatonin may help treat PCOS symptoms in rats.
41 citations
,
January 2000 in “Hormone Research in Paediatrics” Cortisone reductase deficiency can cause high androgen and cortisol levels and may be missed in women with similar symptoms.
40 citations
,
December 2016 in “Journal of Ovarian Research” Rutin may help treat symptoms of polycystic ovary syndrome (PCOS) in rats.
38 citations
,
October 2011 in “Analytical biochemistry” Hair proteins have weak spots in their α-helical segments.