January 2011 in “Journal of Society of Cosmetic Chemists of Japan” 18-MEA and SPDA can restore damaged hair's smoothness and reduce frizz.
24 citations
,
April 2016 in “Experimental Dermatology” Chemical treatments like dyeing, perming, and bleaching damage hair by altering amino acids and lipids.
14 citations
,
May 2008 in “Journal of proteome research” Dutasteride may help reduce brain plaque linked to Alzheimer's by affecting cell energy structures and waste removal.
March 2005 in “Journal of the American Academy of Dermatology” Adding amino acids to damaged hair can improve its strength and appearance.
49 citations
,
May 1974 in “Biochimica et Biophysica Acta (BBA) - Protein Structure” Transamidases are present in the epidermis but their exact role is unclear.
18 citations
,
October 2022 in “JCI Insight” Abnormal amino acid metabolism may worsen rosacea symptoms.
10 citations
,
March 2014 in “Scandinavian journal of clinical and laboratory investigation” Malondialdehyde-modified DNA may trigger an immune response in alopecia areata patients.
5 citations
,
August 2021 in “Frontiers in Cell and Developmental Biology” DHEA boosts bone cell growth and differentiation in elderly stem cells.
71 citations
,
June 2005 in “Journal of Investigative Dermatology” PAD enzymes play a key role in hair growth and structure.
75 citations
,
June 2007 in “Journal of Biological Chemistry” MT-DADMe-ImmA can selectively kill head and neck cancer cells without harming normal cells.
1 citations
,
July 1997 in “The Lancet” Scientists found a new protein, AMY117, common in Alzheimer's patients, which could be important for treatment and diagnosis.
August 2023 in “Dermatology reports” A baby with maple syrup urine disease improved from skin problems by adjusting his diet to correct amino acid levels.
2 citations
,
June 2018 in “Cosmetics” AMPD is a better and less damaging alternative to ammonium hydroxide for hair bleaching.
January 2024 in “International Journal of Cosmetic Science” A new method using 1,4-n-butylene dimaleate effectively repairs and strengthens damaged hair.
4 citations
,
December 2018 in “Macedonian Journal of Chemistry and Chemical Engineering” A new method accurately measures amino acids in treated hair, showing bleaching reduces amino acids while protein treatments increase them.
April 2024 in “Current research in nutrition and food science” Taking an amino acid supplement improved skin, hair, and nail health in women.
October 2025 in “Coloration Technology” Delipidised wool is brighter, dyes better, and is more eco-friendly.
37 citations
,
February 2005 in “Journal of Investigative Dermatology” Overexpression of SSAT causes hair loss and skin issues, but reducing putrescine can help.
18 citations
,
June 2016 in “Clinical and Experimental Dermatology” Increasing isoleucine intake improved skin and health issues in an infant with maple syrup urine disease.
3 citations
,
January 2004 in “Sen i Gakkaishi” DTDG in hair treatments reduces damage and preserves hair structure.
42 citations
,
May 1997 in “The Journal of Biochemistry” PAD type III enzyme is specific to rat skin and hair follicles.
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.
January 2013 in “Transactions of the Materials Research Society of Japan” CMADK reduces hair damage from bleaching and permanent waving.
October 2004 in “Australian Prescriber” Agalsidase alfa helps treat Fabry's disease but needs more research for long-term benefits.
9 citations
,
July 2022 in “Journal of Cosmetic Dermatology” The ammonia-free hair dye is safe and improves hair shine, color, moisture, porosity, and combability.
September 2009 in “Annales D Endocrinologie” DHEA supplementation may improve quality of life, neuropsychological functions, and sexual satisfaction in individuals with adrenal insufficiency, but more research is needed to confirm its safety and effectiveness.
26 citations
,
March 2006 in “Endocrine, metabolic & immune disorders. Drug targets” This enzyme helps metabolize fatty acids and isoleucine, and could be key in treating neurological diseases and certain cancers.
April 2015 in “Journal of Nutritional Therapeutics” Looser dietary restrictions can improve growth and reduce illness in methylmalonic acidemia patients.
2 citations
,
January 1981 High temperatures and certain chemicals can significantly change the amino acid content in human hair.
December 2023 in “Sains Malaysiana” The enzyme Rand protease works well for leather dehairing and its stability is important, with Leu75 playing a key role.