67 citations,
December 1990 in “The journal of cell biology/The Journal of cell biology” Researchers found genes for cysteine-rich proteins that form the protective layer of hair in humans and sheep.
40 citations,
July 2015 in “Journal of Cellular Biochemistry” Cysteine helps maintain keratin production in skin cells even when iron is low.
40 citations,
November 1998 in “The journal of investigative dermatology/Journal of investigative dermatology” S100A3 protein is crucial for hair shaft formation in mice.
36 citations,
November 2019 in “Molecular biology and evolution” Cysteine-rich keratins evolved independently in mammals, reptiles, and birds for hard skin structures like hair, claws, and feathers.
28 citations,
October 2011 in “International Journal of Molecular Medicine” Adenosine helps hair grow longer and stronger by boosting certain growth factors and signaling pathways.
28 citations,
December 2011 in “Biocatalysis and biotransformation” PDI helps restore over-bleached hair's strength and structure by attaching special peptides.
9 citations,
January 2011 in “Journal of X-ray science and technology” Perming and bleaching damage hair differently, with bleached hair having more cysteic acid in the cuticle.
9 citations,
August 2007 in “Journal of animal science/Journal of animal science ... and ASAS reference compendium” Sheep wool follicles absorb different amino acids at various rates and locations, which could affect wool growth based on diet and genetics.
9 citations,
June 1947 in “Analytical Chemistry” Cold waving solutions quickly reduce cystine to cysteine in hair.
1 citations,
July 2022 in “Clinical and Experimental Dermatology” Amino acid supplements may not be necessary for all women with chronic hair loss.
January 2024 in “International Journal of Cosmetic Science” A new method using 1,4-n-butylene dimaleate effectively repairs and strengthens damaged hair.
August 2022 in “Clinical and Experimental Dermatology” Amino acid supplements may not be necessary for all women with chronic hair loss.
January 2008 in “Chinese Journal of Spectroscopy Laboratory” Cysteine formation on hair indicates damage, best detected at pH 4.5.
75 citations,
March 2018 in “Molecules/Molecules online/Molecules annual” L-Cysteine may have health benefits, but its effectiveness is still debated due to limited clinical trial data.
29 citations,
August 2005 in “Biopolymers” L-cysteine slows down the breaking of bonds in hair due to electrostatic interactions.
18 citations,
January 2008 in “Sen'i Gakkaishi” Thioglycolic acid and L-cysteine change hair structure differently during perms, affecting hair strength and curling efficiency.
2 citations,
December 2019 in “Textile Research Journal” L-cysteine and ultrasound successfully improved rabbit hair fibers for industrial use.
March 2021 in “Juniper Online Journal Material Science” Energy healing treatment improved L-cysteine's stability, solubility, bioavailability, and shelf-life.
17 citations,
December 2002 in “Biochemical and biophysical research communications” Scientists found out how a specific protein in human hair cuticles behaves and is structured.
10 citations,
November 2018 in “Genetics in medicine” Lack of cystatin M/E causes thin hair and dry skin.
4 citations,
December 2013 in “Acupuncture and related therapies” N-acetyl-cysteine shows promise in treating various diseases and may improve skin and hair conditions, but more research is needed on dosages and long-term effects.
May 2018 in “International journal of clinical obstetrics and gynaecology” N-acetyl cysteine and metformin both improved fertility in women with PCOS equally, but N-acetyl cysteine had fewer side effects.
October 2006 in “Clinical Cancer Research” Antioxidants can block the cancer-fighting effects of doxorubicin.
October 2021 in “QJM: An International Journal of Medicine” N-acetyl-cysteine improves hair growth and is safe for treating early male hair loss.
September 2019 in “The journal of investigative dermatology/Journal of investigative dermatology” Not having enough cystatin M/E protein causes less hair growth and dry skin.
14 citations,
January 2004 in “Journal of Biochemical and Molecular Toxicology” Mustard gas exposure causes hair loss, but treating with N-acetylcysteine can prevent it.
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.
20 citations,
December 2012 in “Journal of molecular structure” The study found that thioglycolic acid breaks down hair bonds more consistently than l-cysteine, which is less damaging to hair.
9 citations,
October 2008 in “Mutation research” N-acetyl-L-cysteine (NAC) can prevent DNA damage and protect cells from harm.
3 citations,
April 2011 in “Neuropsychiatry” Behavioral therapy, N-acetyl cysteine, and olanzapine may help treat trichotillomania.