14 citations
,
November 2015 in “Annals of the New York Academy of Sciences” Changing the diet of mice lacking the enzyme CBS can affect symptoms related to the genetic condition.
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.
8 citations
,
January 2009 in “Transactions of the Materials Research Society of Japan” Water-soluble wool keratin can protect human hair from damage during treatments.
January 2024 in “International Journal of Cosmetic Science” A new method using 1,4-n-butylene dimaleate effectively repairs and strengthens damaged hair.
March 2021 in “Juniper Online Journal Material Science” Energy healing treatment improved L-cysteine's stability, solubility, bioavailability, and shelf-life.
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.
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.
24 citations
,
October 2019 in “Genes” A new sheep gene, KRTAP36-1, may help breed sheep with better wool by reducing prickle factor.
12 citations
,
February 1998 in “Gene” The B2 genes are crucial for hair growth in rats.
4 citations
,
January 2020 in “Frontiers in Physiology” Good feather growth in poultry needs the right balance of proteins, amino acids, minerals, and vitamins.
February 2025 in “Clinical & Experimental Dermatology and Therapies” Combining supplements with minoxidil improves hair growth more than minoxidil alone.
Plant roots respond to fungus smells by possibly using certain proteins and a plant hormone to change root growth, but more research is needed.
May 2026 in “Preprints.org” The nutrient combination improved hair condition and was safe for women with diffuse hair loss.
July 2024 in “Skin Appendage Disorders” The supplement significantly improves hair density and appearance in people with hair loss.
16 citations
,
August 1989 in “PubMed” Retinol and L-cystine improve diffuse hair loss without side effects.
13 citations
,
March 2006 in “International Journal of Cosmetic Science” The study found that a polymer treatment changes the charge on hair surfaces, making bleached hair smoother and less porous.
1 citations
,
April 2015 in “Current problems in dermatology” The document concludes that the trichogram is a useful tool for diagnosing hair loss and suggests semi-organ cultures for practical trichological research.
215 citations
,
March 2018 in “Archives of Toxicology” Tiny pollution particles called PM2.5 can harm skin cells by causing stress, damage to cell parts, and cell death.
9 citations
,
September 2017 in “Journal of Investigative Dermatology Symposium Proceedings” Prostaglandin D2 increases testosterone production in skin cells through a process involving reactive oxygen species, and antioxidants may help treat hair loss.
2 citations
,
January 2012 in “Journal of metabolic syndrome” The document concludes that hirsutism can be managed with various treatments tailored to the individual, potentially improving quality of life.
April 2025 in “Research Journal of Topical and Cosmetic Sciences” Bromelain in shampoo is a safe and effective anti-dandruff treatment that improves hair health and shine.
January 2009 in “Elsevier eBooks” Some plant-based treatments may help with ovary function, insulin resistance, and excess male hormones in PCOS, but more research is needed to confirm their safety and effectiveness.
5 citations
,
May 2022 in “Fashion and Textiles” Hair conditioners with argan oil or camellia oil improve the strength and color of bleached hair.
77 citations
,
March 2000 in “Journal of Investigative Dermatology” The research identified six functional hair keratin genes and four pseudogenes, providing insights into hair formation and gene organization.
140 citations
,
August 2010 in “Pigment Cell & Melanoma Research” We know a lot about mouse hair color, but not much about human hair color differences.
6 citations
,
September 2010 in “Pigment Cell & Melanoma Research” We know less about human hair pigmentation than mouse coat color, but pH and cysteine levels are key factors.
1 citations
,
August 2021 in “Frontiers in Genetics” Certain genes related to sulfur metabolism are more active during the growth phase of Cashmere goat wool, and melatonin might help this process.
175 citations
,
December 1980 in “Archives of Dermatology” Trichothiodystrophy is a condition with brittle hair and various physical and mental issues due to low sulfur in proteins.
2 citations
,
January 1989 Tay syndrome is a unique genetic disorder causing skin, hair, and developmental issues.
38 citations
,
May 2000 in “Livestock production science” Giving high-quality protein or methionine supplements helps improve hair growth in Angora goats and, to a lesser extent, in Cashmere goats.