April 2023 in “Acta Poloniae Pharmaceutica” Herbal extract shampoo increased certain minerals in hair and improved hair growth and scalp health.
December 2022 in “Himi, himijn tehnologijn hùrèèlèngijn èrdèm šinžilgèènij bùtèèl” Hair products with copper and zinc enriched yeast made hair thicker and denser.
August 2022 in “International Journal of Health Sciences (IJHS)” Low levels of zinc, ferritin, and vitamin B12 are linked to severe hair loss in pregnant women during their last two trimesters.
January 2011 in “Nuclear Techniques” Lead levels in hair increased due to environmental exposure, while iron, copper, and zinc levels stayed stable.
Zinc, chromium, and magnesium levels in hair might indicate metabolic health.
January 1992 in “Journal of Oriental Neuropsychiatry” People with schizophrenia have lower zinc, copper, and chromium in their hair.
26 citations
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October 2011 in “Biological trace element research” Low copper levels might cause premature graying of hair.
6 citations
,
January 2008 in “PubMed” 
73 citations
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January 2013 in “Annals of Dermatology” People with hair loss, especially those with certain types, have lower zinc levels, and zinc supplements might help.
February 2013 in “Journal of the American Academy of Dermatology” The zinc pyrithione hair care system improves scalp hydration and reduces water loss.
101 citations
,
November 2019 in “The Plant Cell” AtZP1 protein stops root hair growth in plants by blocking certain genes.
72 citations
,
September 1975 in “Biology of Reproduction” Most zinc in rat sperm is in the tail, linked to structures similar to hair keratin.
January 2024 in “Biochemical and Biophysical Research Communications” Lack of zinc can cause hearing loss by damaging important parts of inner ear cells in mice.
January 2024 in “International journal of chemical research and development (Print)” Low levels of vitamin B12, iron, ferritin, and zinc are linked to hair loss in Iraqi women.
January 2019 in “Türkiye klinikleri dermatoloji dergisi” Low levels of iron, ferritin, zinc, and folic acid may contribute to hair loss in women.
March 1963 in “Sangyo Igaku” Women generally have higher levels of iron, copper, and zinc in their hair than men, with differences increasing with age.
November 1979 in “PubMed” 13 citations
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March 1962 in “Nature” Carcinoma patients may have lower zinc levels in their hair.
1 citations
,
August 1983 in “British Journal of Dermatology” 
1 citations
,
January 2021 in “International journal of pharmaceutical research” Low levels of ferritin, TSH, and certain vitamins are linked to hair loss in women of different ages.
2 citations
,
January 1977 in “PubMed” 5 citations
,
August 2013 in “Epilepsy & Behavior” 2 citations
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January 2016 in “DOAJ (DOAJ: Directory of Open Access Journals)” Zinc supplements may help reduce hair loss caused by levetiracetam without affecting seizure control.
1 citations
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January 1985 in “IRIS UNIMORE (University of Modena and Reggio Emilia)” 
January 2024 in “Frontiers in plant science” The zinc finger protein 3 in Arabidopsis thaliana reduces plant growth and root hair development.
3 citations
,
January 2007 in “Korean Journal of Pediatrics” Zinc supplements can help skin issues even if blood zinc levels are normal.
2 citations
,
January 2011 in “프로그램북(구 초록집)” January 2026 in “Journal of Trace Elements in Medicine and Biology” Dogs have more iron and copper in their hair than cats, and outdoor animals have higher iron levels.
March 2022 in “Annals of Bariatric Surgery” Protein supplements with zinc, iron, and B vitamins reduce hair loss after sleeve gastrectomy.