Polyglutamic acid is a valuable, sustainable ingredient for skincare and haircare products.
5 citations
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January 2015 in “Molecular Genetics and Metabolism” 5 citations
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February 1998 in “Polymer” Human hair keratin has a 40% α-helix structure that changes to a random coil in 8 M urea.
April 2024 in “Research Square (Research Square)” 16-MHA can restore the barrier and moisture of damaged hair, making it similar to undamaged hair.
6 citations
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July 2022 in “The FASEB Journal” Methionine helps improve hair growth in heat-stressed rabbits.
15 citations
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August 1991 in “American Journal of Medical Genetics” A special diet can fix hair problems in argininosuccinase deficiency.
5 citations
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January 1985 in “Annals of Nutrition and Metabolism” Methionine intake changes tooth germ development in newborn rats.
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April 2013 in “Journal of Cosmetic and Laser Therapy” Argireline significantly reduces wrinkles.
7 citations
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January 1982 in “Acta agriculturae Scandinavica” Mink use L-methionine and L-cystine slightly better than natural amino acids for hair growth, but D-methionine is not effective.
October 2025 in “Journal of Molecular Structure” Hyaluronic acid microneedles help deliver minoxidil derivatives effectively for hair regrowth.
August 2025 in “International Journal of Molecular Sciences” AVT is highly conserved and may have antimicrobial properties.
January 2022 in “Social Science Research Network” A special coating was made for artificial hair fibers that can slowly release silver ions for up to 56 days, providing long-term protection against bacteria and inflammation.
66 citations
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February 2010 in “CrystEngComm” Made 8 minoxidil samples; 1 cocrystal, 7 salts formed.
May 2010 in “Europe PMC (PubMed Central)” Near-infrared probes can safely and effectively image cysteine protease activity for disease diagnosis.
October 2021 in “Authorea (Authorea)” New hair perming method using tyrosine is gentler and can be done with a blow-dryer.
43 citations
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May 1999 in “Journal of Biological Chemistry” Agouti protein affects melanocortin receptors through competitive antagonism and receptor down-regulation.
April 2024 in “Current research in nutrition and food science” Taking an amino acid supplement improved skin, hair, and nail health in women.
2 citations
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August 2004 Early diagnosis and proper treatment improve outcomes for methylmalonic acidemia.
20 citations
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February 1968 in “Journal of Histochemistry & Cytochemistry” A new test more accurately detects citrulline in hair follicles and pilomatrixomas.
15 citations
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October 1970 in “Archives of disease in childhood” Hair amino acid levels can indicate metabolic disorders.
April 2015 in “Journal of Nutritional Therapeutics” Looser dietary restrictions can improve growth and reduce illness in methylmalonic acidemia patients.
4 citations
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November 2024 in “Scientific Reports” 16-MHA can restore damaged hair's protective barrier and moisture balance.
110 citations
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January 1995 in “European Journal of Neuroscience” Glycine is a key transmitter in rat spinal cord synapses, often alongside GABA.
1 citations
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April 2022 in “Crystal Growth & Design” The 1298CC genotype in RA patients leads to higher methotrexate toxicity, while the 1298AA genotype results in better treatment response.
Problems with arginine processing in hair follicles might contribute to common hair loss, and arginine supplements could help treat it.
December 2022 in “Small methods” A new hair loss treatment using dissolving microneedles was found to speed up hair growth and was more effective than daily use of common hair growth drugs.
9 citations
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January 1981 Nucleophilic reagents break down hair keratin, forming more lanthionine and lysinoalanine than in wool.
8 citations
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June 1981 in “Clinica Chimica Acta” April 2021 in “Journal of Investigative Dermatology” Arg1+ macrophages may play a role in causing alopecia areata.