November 2025 in “JDDG Journal der Deutschen Dermatologischen Gesellschaft” Restoring phenylalanine levels improved skin and hair symptoms in a PKU infant.
15 citations
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January 1981 in “Neonatology” Amino acid levels in milk increase with protein and align with key growth stages in Macropus eugenii.
August 2025 in “Frontiers in Nutrition” Leucine levels may affect hair loss after bariatric surgery.
15 citations
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October 1970 in “Archives of disease in childhood” Hair amino acid levels can indicate metabolic disorders.
4 citations
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January 1976 in “Archives of Dermatological Research” Metabolic disorders can cause hair structure defects and growth issues, but amino acid levels in hair remain normal.