28 citations
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October 2011 in “International Journal of Molecular Medicine” Adenosine helps hair grow longer and stronger by boosting certain growth factors and signaling pathways.
26 citations
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March 1995 in “Differentiation” A rabbit gene important for hair development was identified and detailed.
24 citations
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October 2019 in “Genes” A new sheep gene, KRTAP36-1, may help breed sheep with better wool by reducing prickle factor.
11 citations
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January 1997 in “Journal of Dermatological Science” A new protein linked to hair strength was identified, aiding in understanding brittle hair conditions.
1 citations
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July 2024 in “International Journal of Dermatology Venereology and Leprosy Sciences” Cysteine strengthens hair, and glutamine fuels hair growth.
1 citations
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July 2022 in “Clinical and Experimental Dermatology” Amino acid supplements may not be necessary for all women with chronic hair loss.
1 citations
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January 1992 in “DNA sequence” Researchers found a non-functional sheep keratin gene due to mutations.
February 2025 in “Clinical & Experimental Dermatology and Therapies” Combining supplements with minoxidil improves hair growth more than minoxidil alone.
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.
March 1990 in “Journal of Dermatological Science”
29 citations
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August 2005 in “Biopolymers” L-cysteine slows down the breaking of bonds in hair due to electrostatic interactions.
18 citations
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January 2008 in “Sen'i Gakkaishi” Thioglycolic acid and L-cysteine change hair structure differently during perms, affecting hair strength and curling efficiency.
11 citations
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June 2012 in “Archives of Dermatological Research” L-cystine and vitamin B6 at high doses prevented hair loss in mice treated with a chemotherapy drug.
3 citations
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January 2017 in “Journal of cosmetology & trichology” The food supplement with L-cystine, Serenoa repens extract, and biotin safely reduced hair loss and improved hair growth in men and women.
2 citations
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August 2020 in “Clinical, Cosmetic and Investigational Dermatology” The hair-growth formula with L-cystine helps protect and grow hair cells.
September 2024 in “Journal of the American Academy of Dermatology” The supplements improved hair density and reduced hair loss.
March 2021 in “Juniper Online Journal Material Science” Energy healing treatment improved L-cysteine's stability, solubility, bioavailability, and shelf-life.
January 2019 in “Journal of cosmetology & trichology” L-Cystine and L-Cystine with Kera-Diet® safely improved hair and nail quality in healthy women.
November 2025 in “Eurasian journal of applied biotechnology” Combining L-cysteine, NAC, and a MET inhibitor significantly kills cervical cancer cells.
32 citations
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January 1966 in “Archives of Dermatology” The method accurately measures hair growth with minimal risk and is better than other techniques.
7 citations
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January 1966 in “Archives of Dermatology” The method accurately measures hair growth with minimal risk and is better than other methods.
6 citations
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January 1998 in “Journal of applied cosmetology” 51 citations
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January 2004 in “European Journal of Cell Biology” Human cathepsin V can replace mouse cathepsin L to maintain normal skin and hair in mice.
10 citations
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November 2018 in “Genetics in medicine” Lack of cystatin M/E causes thin hair and dry skin.
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 2021 in “QJM: An International Journal of Medicine” N-acetyl-cysteine improves hair growth and is safe for treating early male hair loss.
January 2007 in “Leather Science and Engineering” 35 citations
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September 1994 in “Journal of Investigative Dermatology”