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January 2017 in “Elsevier eBooks” The document concludes that cosmetics need biocompatible, eco-friendly ingredients due to aging populations and demand for effective products.
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August 2007 in “PubMed” Amino acids in conditioners improve hair strength, hydration, and color retention.
April 2024 in “Current research in nutrition and food science” Taking an amino acid supplement improved skin, hair, and nail health in women.
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October 1970 in “Archives of disease in childhood” Hair amino acid levels can indicate metabolic disorders.
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