5 citations
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July 2006 in “Contact dermatitis” Ammonium bisulfite in hair bleach can cause facial eczema.
43 citations
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April 2005 in “The Journal of Dermatology” Biotin supplements improved skin and hair in a biotin-deficient infant on amino acid formula.
17 citations
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February 1987 in “Journal of the American Academy of Dermatology” The hair cuticle acts as a barrier against fungal infection, which occurs only deep within the hair follicle.
1 citations
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December 1965 in “PubMed” 5 citations
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July 2014 in “Journal of X-Ray Science and Technology” Hair analysis can help diagnose cell ion channel activity and calcium deficiency.
1 citations
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December 2021 in “Animals” Low zinc and selenium levels in sheep are linked to hair loss and thyroid problems.
1 citations
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January 1996 Cysteine and arginine are essential for hair growth and thickness.
101 citations
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August 2010 in “PLoS ONE” Selenoproteins are crucial for healthy skin and hair.
4 citations
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May 1989 in “Journal of the Royal Society of Medicine” Crohn's disease can cause hair loss before other symptoms appear.
13 citations
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August 1982 in “PubMed” Zinc deficiency causes skin issues and hair loss, treatable with zinc supplements.
3 citations
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September 2016 in “Clinical, cosmetic and investigational dermatology” Sphinganine can reduce hair loss and improve scalp health.
12 citations
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February 2006 in “Lipids” Hair texture changes with age due to varying levels of lipids.
September 2019 in “The journal of investigative dermatology/Journal of investigative dermatology” Not having enough cystatin M/E protein causes less hair growth and dry skin.
January 2015 in “Springer eBooks” Hair damage shows as fragility, dullness, and discoloration, varies by ethnicity, and is worsened by cosmetic procedures and diseases.
42 citations
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February 1996 in “Journal of Investigative Dermatology” Polyamines, especially spermidine, are essential for hair growth.
47 citations
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July 1967 in “Science” Not eating enough protein can cause hair roots to shrink and lose color, and hair to become thinner.
81 citations
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March 2006 in “Journal of Investigative Dermatology” Mutations in the DSG4 gene cause specific hair and scalp issues.
18 citations
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January 2008 in “Sen'i Gakkaishi” Thioglycolic acid and L-cysteine change hair structure differently during perms, affecting hair strength and curling efficiency.
June 2026 in “Frontiers in Allergy” SSD patients have unique allergen sensitivities linked to skin and microbiota changes.
July 2025 in “International Journal of Pharmaceutical Sciences Review and Research” Balanced selenium intake from wheat is crucial for preventing hair loss.
February 2013 in “Journal of the American Academy of Dermatology” Iron supplements may reverse premature hair graying caused by iron deficiency.
6 citations
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January 2020 in “Postepy Dermatologii I Alergologii” Check and treat low iron and vitamin D levels in people with hair loss.
31 citations
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September 2010 in “Current Opinion in Clinical Nutrition & Metabolic Care” Micronutrient deficiencies may cause hair loss in people on long-term parenteral nutrition.
Low vitamin C caused bleeding and corkscrew hair, resolved with vitamin C treatment.
2 citations
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January 2015 in “Sen'i Gakkaishi” Washing permed hair after using thioglycolic acid helps reform strong bonds, making hair stronger.
42 citations
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July 2014 in “Journal of biological chemistry/The Journal of biological chemistry” Heparan sulfate is important for hair growth, preventing new hair formation in mature skin, and controlling oil gland development.
May 2025 in “Journal of Dermatological Treatment” The shampoo improved seborrheic dermatitis symptoms, but worked better for males than females.
10 citations
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May 1974 in “American journal of diseases of children” The girl had a rare disorder causing mental and physical symptoms, with weak hair and unclear neurological issues.
The conclusion is that hair supplement ingredients may be unsafe and should be disclosed and proven safe before use.
30 citations
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October 2010 in “Journal of The American Academy of Dermatology” The conclusion suggests a possible link between iron levels and hair health in women, recommending further research on iron supplementation for hair loss.