January 2011 in “Yearbook of Dermatology and Dermatologic Surgery” Hair relaxers are linked to reduced cystine levels and potential hair damage.
15 citations
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October 1970 in “Archives of disease in childhood” Hair amino acid levels can indicate metabolic disorders.
August 2023 in “Dermatology reports” A baby with maple syrup urine disease improved from skin problems by adjusting his diet to correct amino acid levels.
3 citations
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September 2017 in “Galen medical journal” Patients with psoriasis and cutaneous-oral lichen planus have higher blood homocysteine levels than healthy people.
20 citations
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December 2011 in “Journal of inherited metabolic disease” Valproic acid treatment increases a specific acid in urine by blocking an enzyme, possibly causing skin rash and hair loss.