55 citations
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December 1987 in “Archives of Dermatology” Two enzyme defects in biotin metabolism cause severe skin, hair, and metabolic issues.
April 2015 in “Journal of Nutritional Therapeutics” Looser dietary restrictions can improve growth and reduce illness in methylmalonic acidemia patients.
February 2026 in “UiTM Institutional Repositories (Universiti Teknologi MARA)” Cis-UCA can form new compounds without enzymes, and sulphide donors reduce its UVB-induced toxicity in skin cells.
66 citations
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October 2002 in “Human molecular genetics online/Human molecular genetics” A gene mutation in mice causes skin defects and early death.
9 citations
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January 1981 Nucleophilic reagents break down hair keratin, forming more lanthionine and lysinoalanine than in wool.
31 citations
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February 1997 in “The Journal of Clinical Endocrinology and Metabolism” People who carry the 21-Hydroxylase Deficiency gene are not more likely to have excessive male hormone levels.
3 citations
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April 2015 in “Current problems in dermatology” A more sensitive assay was developed to detect enzyme activity converting arginine to citrulline in hair follicles.
14 citations
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September 2007 in “Steroids” The study concluded that androstendione and DHEA are important for diagnosing high male hormone levels in women with excessive hair growth.
April 2024 in “Advances in Redox Research” Human hair strength and health are linked to sulfur compounds that can be reduced by stress but improved with sulfur supplements.
2 citations
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January 1981 High temperatures and certain chemicals can significantly change the amino acid content in human hair.
November 2022 in “Journal of the Endocrine Society” Estrogen deficiency can reduce the enzyme activity needed to activate vitamin D.
4 citations
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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.
3 citations
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July 2022 in “Brain and Behavior” The HtrA1L364P mutation causes brain dysfunction and blood vessel damage.
8 citations
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January 2016 in “Journal of fiber science and technology” Bleaching hair increases cysteic acid levels in a predictable way.
11 citations
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January 1989 Two patients had a unique form of trichothiodystrophy with reduced high-sulfur proteins in their hair.
5 citations
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September 2021 in “Journal of Medical Biochemistry” wAMD patients have higher oxidative stress, suggesting antioxidant treatment may help.
138 citations
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November 1977 in “Biochimica et Biophysica Acta (BBA) - Proteins and Proteomics” January 2017 in “Elsevier eBooks” Congenital Adrenal Hyperplasia is mainly caused by enzyme deficiencies, leading to varying symptoms like hormone imbalances and physical changes.
November 2022 in “The journal of investigative dermatology/Journal of investigative dermatology” Hemoglobin α acts as an antioxidant in skin cells, especially protecting hair follicle stem cells from UV damage.
3 citations
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December 1956 in “PubMed” April 2023 in “Journal of Investigative Dermatology” Trichohyalin in hair can trigger immune attacks in alopecia areata.
23 citations
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November 1964 in “Journal of Dairy Science” High molybdenum and sulfate sulfur levels can cause health issues in cattle, but adding copper helps.
January 2002 in “HAL (Le Centre pour la Communication Scientifique Directe)” The enzyme system in hair follicles is similar to the liver's and is inhibited by certain substances.
46 citations
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November 1963 in “Journal of Histochemistry & Cytochemistry” Arginine converts to citrulline in hair follicles as proteins harden.
September 2017 in “The journal of investigative dermatology/Journal of investigative dermatology” The hexosamine pathway helps maintain healthy skin by affecting the skin's structure and possibly increasing hair follicle stem cells.
13 citations
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February 2020 in “CHEST Journal” Vitamin C supplementation can resolve pulmonary arterial hypertension caused by vitamin C deficiency.
175 citations
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August 1997 in “Nature Genetics”
26 citations
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March 2009 in “Dermato-endocrinology” The document concludes that diagnosing and treating Congenital Adrenal Hyperplasia is complex and requires a team approach due to its effects on the skin and other symptoms.
1 citations
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January 2024 in “Pediatric Dermatology” The boy's scurvy symptoms improved with vitamin C treatment, highlighting the need for a balanced diet.
July 2025 in “Ecotoxicology and Environmental Safety” Higher levels of molybdenum and lead in hair are linked to increased cholesterol and dyslipidemia risk.