August 2025 in “Applied Sciences” Peroxide-rich plasma-activated water is gentler on hair than nitrate-rich formulations.
May 2026 in “International Journal of Cosmetic Science” The study investigates the effectiveness of a plant-derived amino acid complex from Avena strigosa seed extract in repairing chemically damaged hair. The treatment significantly improved hair properties, as evidenced by scanning electron microscopy, glossmetry, and tensile testing. Results showed a 23% decrease in surface area porosity, a 105% increase in gloss after five washes, and up to a 30% improvement in tensile strength. Molecular assays confirmed the complex's interaction with keratin, reducing free sulfhydryl groups by 9.2% and stabilizing disulphide bonds. An in vivo study with 20 participants demonstrated enhanced shine and smoothness compared to a placebo. The A. strigosa complex effectively reinforces keratin intra-bonding, offering a promising solution for restoring hair strength and surface quality.
January 2004 in “Zhōnghuá yàoxué zázhì” The new method for making finasteride is cheaper and gives a higher yield.
15 citations
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October 1936 in “Archives of Dermatology” Cystine is crucial for forming keratin in hair, wool, and nails.
February 2020 in “The Pharmaceutical Society of Japan” 
83 citations
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July 2008 in “Current Opinion in Chemical Biology” The document concludes that understanding sulfation biology is crucial for creating treatments due to its importance in biological functions and disease.
January 2018 in “ScholarWorks @UVM (University of Vermont)” Selenium in proteins helps prevent over-oxidation and supports chemical reversibility.
75 citations
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August 2018 in “Plant physiology” Hydrogen sulfide disrupts protein function and root hair growth in plants by modifying proteins.
26 citations
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January 1983 in “PubMed” Trichothiodystrophy involves brittle hair due to low sulfur amino acids, not a transport defect.
84 citations
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June 1970 in “Journal of Investigative Dermatology” 
January 2026 in “Beilstein Journal of Organic Chemistry” A new, efficient method creates sulfinimidate esters from sulfenamides and alcohols without metals.
175 citations
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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.
1 citations
,
January 2017 in “Science” A new method was developed to create complex molecular knots using iron ions.
44 citations
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January 1984 in “Molecular and Cellular Biochemistry” 144 citations
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May 1990 in “Journal of the American Academy of Dermatology” 22 citations
,
December 2020 in “mSphere” A fungal enzyme was used to make compounds more soluble, aiding drug discovery and crop protection.
4 citations
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November 1968 in “Textile research journal” Hair fibers may have a unique, non-protein sheath not previously identified.
54 citations
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January 1984 in “Molecular and Cellular Biochemistry” Prussian Blue causes hair cuticles to detach, weakening the hair.
42 citations
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April 2008 in “Acta materialia” Different ethnicities and treatments affect human hair strength and structure.
40 citations
,
June 2013 in “Journal of cosmetic dermatology” Brazilian keratin treatments can straighten hair but may contain harmful formaldehyde.
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.
22 citations
,
March 2018 in “American Journal of Clinical Dermatology” New acne treatments show promise as alternatives to traditional therapies.
4 citations
,
July 2016 in “Journal of cosmetic dermatology” Dermatologists should use hair relaxers carefully to avoid hair and scalp damage, following specific guidelines for application and maintenance.
September 2020 in “Benha Journal of Applied Sciences” Protein hair straighteners damage the hair more than hair dyes.
January 2019 in “Springer eBooks” Some chemicals and drugs can cause hair loss, which usually grows back after stopping the treatment.
111 citations
,
August 2002 in “Journal of Medicinal Chemistry” New compounds were made that block an enzyme linked to breast cancer better than existing treatments.
The study identified a key protein involved in producing underarm odor and found ways to inhibit it.
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.
2 citations
,
January 1968 in “PubMed” Sulfur-containing radioprotectors can protect hair from X-ray damage if given before exposure but worsen damage if given after.