April 2018 in “Journal of Investigative Dermatology” Screening for the NUDT15 gene variant can prevent severe side effects from thiopurine drugs in East-Asian people.
March 2019 in “Reactions Weekly” 
January 2013 in “The Pan African medical journal” Monilethrix causes short, fragile hair with no specific treatment available.
12 citations
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September 2018 in “International Journal of Cosmetic Science” Palmitoyl tetrapeptide-20 may help reduce hair greying and increase melanin production.
10 citations
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October 2021 in “Animal nutrition” Vitamin B6 helps increase hair growth and density in rabbits by affecting certain cell signaling pathways.
Low Vitamin D, Vitamin B12, and iron levels, as well as thyroid issues, are strongly linked to premature greying of hair, which also negatively affects quality of life.
15 citations
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January 1954 in “Endocrinology” Iodine in rat hair is linked to hair growth.
4 citations
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January 2000 Piedraia hortae fungi dissolve both the outer and inner layers of hair.
84 citations
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June 1970 in “Journal of Investigative Dermatology” 3 citations
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May 1964 in “Nature” June 2023 in “Clinical Cosmetic and Investigational Dermatology” Pentoxifylline effectively improves pretibial pruritic papular dermatitis.
17 citations
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January 2009 in “Nippon Ishinkin Gakkai Zasshi” A 10-year-old boy recovered from a scalp infection caused by a fungus after treatment with itraconazole.
16 citations
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October 2009 in “Xenobiotica” The tested hair dye ingredients do not form harmful oxidized metabolites in the liver.
June 2011 in “European Journal of Pediatric Dermatology” An 11-year-old girl with hair thinning was diagnosed with monilethrix and early androgenetic alopecia.
1 citations
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June 2022 in “Movement disorders clinical practice” A patient with Wilson's disease showed hair-pulling behavior as an initial symptom.
1 citations
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January 1985 in “IRIS UNIMORE (University of Modena and Reggio Emilia)” 6 citations
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September 1957 in “Poultry Science” Adding copper helps turkey poults grow better when molybdenum is present.
January 2007 in “Revista del Centro Dermatológico Pascua” A 2-year-old boy was diagnosed with a rare genetic condition causing fragile hair, intellectual issues, and short stature.
April 1996 in “Journal of Dermatological Science” 
October 2011 in “Journal of dermatology” A man with a rare skin condition and a new gene mutation developed high calcium levels due to his treatment.
2 citations
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May 2017 in “Endocrinology, diabetes & metabolism case reports” Lugol's solution can cause thyroid problems if used long-term for non-approved reasons.
June 2020 in “Zenodo (CERN European Organization for Nuclear Research)” Reptiles on the Absheron Peninsula accumulate toxic elements in their tissues but survive due to tissue resilience.
2 citations
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October 2018 in “Journal of Mind and Medical Sciences” A new method effectively detects toxic pyrrolizidine alkaloids in honey and flour.
February 2026 in “iScience” Hair metal analysis may help diagnose Parkinson's disease and suggests gut involvement.
95 citations
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August 2013 in “Journal of Investigative Dermatology” HPT axis hormones boost mitochondrial function and growth in hair follicles, potentially aiding hair health.
January 2023 in “Indian dermatology online journal” A child with trichothiodystrophy also had autoimmune thyroiditis and anemia, which is a new finding.
January 2006 in “Benzina: Revista d'excepcions culturals” Trienones are more effective at inhibiting the enzyme linked to hair loss than dienones.
31 citations
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September 2014 in “International Journal of Dermatology” Anthralin is effective for psoriasis and alopecia with minimal systemic side effects but can irritate the skin.
63 citations
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February 2017 in “ACS biomaterials science & engineering” Polydopamine is a safe, effective, and permanent hair dye that turns gray hair black in one hour.