29 citations
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July 1996 in “Acta Paediatrica” This study found that an 11-month-old Japanese infant developed biotin deficiency while on a Japanese amino acid formula without biotin, which was resolved with biotin supplementation.
September 2025 in “Journal of Surfactants and Detergents” In this study, shampoos containing sodium lauroyl methylaminopropionate showed superior coacervate formation and lubrication on wet hair, outperforming other amino acid surfactants and suggesting potential for creating low-irritation, high-performance hair products.
43 citations
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April 2005 in “The Journal of Dermatology” This case report describes a 5-month-old Japanese infant with biotin deficiency, where daily oral biotin supplementation led to significant improvements in skin conditions and hair growth.
July 2026 in “Preprints.org” In this study, incorporating a novel amino acid compound into a hair-straightening formulation improved humidity-resistant straightening and enhanced the surface and mechanical properties of hair fibers, including increased bending stiffness, reduced friction, and better shape retention under high temperature and humidity conditions.
This chapter explores the causes and management of hair damage, highlighting effective repair strategies such as protein and lipid replenishment with keratin peptides and citric acid, and identifies social media's role in consumer preferences for protective and conditioning products.