12 citations
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June 2011 in “Journal of applied polymer science” This study found that hydrophobic amino acids from egg white hydrolyzed protein and L-phenylalanine effectively penetrate deep into the human hair fiber, increasing specific contents in both virgin and bleached hair.
May 2023 in “Research Square (Research Square)” This study identified 18 significant metabolites and two enriched metabolic pathways, necroptosis and ABC transporters, in serum samples of acne patients with and without insulin resistance, potentially aiding in the clinical diagnosis and drug development for these patients.
1 citations
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March 2012 in “Revue neurologique” This study reports that both a 9-month-old with phenylketonuria on a phenylalanine-free diet and mice on a deficient diet exhibited severe health issues, highlighting the need for cautious dietary management.
1 citations
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July 2022 in “Plant Cell, Tissue and Organ Culture (PCTOC)” This study identified that the biosynthetic pathways for coumestans in Eclipta prostrata are derived from acetate and shikimate pathways, while phenylpropanoid biosynthesis is exclusively from the shikimate pathway.
April 2022 in “Research Square (Research Square)” This study found that the biosynthetic pathways of coumestans in Eclipta prostrata are derived from acetate and shikimate pathways, while 3,5-di-O-caffeoylquinic acid biosynthesis originates exclusively from the shikimate pathway.
3 citations
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October 2022 in “Han'gug dongmul jawon gwahag hoeji/Han-guk dongmul jawon gwahak hoeji/Journal of animal science and technology” This study found that L-glutamine supplementation in Hanwoo steers under heat stress did not affect growth performance or muscle and adipose tissue gene expression but was associated with increased immune cells and reduced HSP90 expression.
29 citations
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August 2005 in “Biopolymers” In this study, researchers found that L-cysteine interacted electrostatically with anionic ions on the surface of keratin fibers in human hair, reducing the rate of disulfide bond disconnection at pH 9.0.
January 2019 in “Journal of cosmetology & trichology” In this study, researchers found that supplementation with L-cystine, either alone or with a keratin hydrolysate, significantly improved hair density, hair and nail brightness, and nail growth in women experiencing acute telogen effluvium and brittle nail syndrome over three months.
This study explored the structure and function of lipocalin prostaglandin D synthase, revealing its dual role in substrate catalysis and as a lipophilic ligand carrier, potentially informing future drug delivery design.
13 citations
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January 2013 in “Molecular genetics and metabolism” This study reported that mice on a phenylalanine-deficient diet showed symptoms such as weight loss, gastric dilation, and thymic depletion, which echo human phenylalanine deficiency manifestations.
28 citations
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March 2017 in “African Journal of Traditional Complementary and Alternative Medicines” This study found that linseed oil, rich in flavonoids and terpenoids, significantly improved burn wound healing in terms of faster contraction, reduced inflammation, and enhanced tissue regeneration compared to other treatments, without adverse effects.
23 citations
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March 2019 in “Journal of Essential Oil Research” This study found a strong correlation between antioxidant activity and phenolic content in rosemary, influenced by bioclimatic and seasonal factors in different stages of Tunisia.
2 citations
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January 2022 in “Journal of Oleo Science” This study found that oil from CG17 garden cress seeds had higher amounts of β-carotenoids, tocopherols, and vitamins compared to other genotypes, with varying physiochemical properties across all seeds.
January 1974 in “Nippon Nōgei Kagakukaishi/Nihon Nougei Kagakkaishi” In this study, L-methionine and L-serine application was observed to have the most significant effect on hair weight and root length, followed by acetyl L-methionine and L-serine, while glutathione inhibited growth.
December 2025 in “Universal library of medical and health sciences.” This study analyzes contemporary theories and practices to understand key factors influencing the development of the examined phenomenon, proposing trends and practical applications for researchers and practitioners, while acknowledging study limitations and suggesting future research directions.
5 citations
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July 2014 in “Acta Crystallographica Section D-biological Crystallography” This study reports that mutations in human L-PGDS affect the entrance and exit of ligands in its binding cavity, suggesting these residues play a role in ligand interaction processes.
20 citations
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March 2013 in “Journal of Lipid Research” This study examined the structural and biochemical mechanisms of human lipocalin prostaglandin D synthase, detailing substrate and product binding processes at the catalytic site and suggesting potential for drug delivery targeting hydrophobic molecules.
38 citations
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April 2020 in “IntechOpen eBooks” This review discusses the potential antidepressant effects of phenylalanine, highlighting its significant activity in laboratory studies, but reports no new clinical findings.
30 citations
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March 2019 in “Archives animal breeding/Archiv für Tierzucht” In this study, variation in the KRTAP15-1 gene in goats was linked to changes in cashmere fibre diameter, with specific variants showing dominant or recessive effects.
15 citations
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October 1970 in “Archives of disease in childhood” Hair amino acid levels can indicate metabolic disorders.
43 citations
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September 2021 in “Nutrients” This review discusses the vast potential uses of persimmon beyond its dietary benefits, including applications in sustainability and new product development, but reports no new clinical outcomes.
August 2025 in “Frontiers in Pharmacology” In this study, PA-011, a traditional Chinese medicine extract, was shown to improve hair growth in alopecia areata model mice by reducing skin inflammation and altering skin microbiota, indicating its potential therapeutic role for this condition.
January 2026 in “International Journal of Molecular Sciences” This review discusses the diverse industrial applications of hemp beyond traditional fiber uses, highlighting its phytochemical components with antioxidant and antimicrobial properties that are explored in agrochemicals, cosmetics, and food sectors.
In this study, aqueous and aqueous-alcoholic extracts of Ajuga reptans showed promising hepatoprotective and wound-healing properties, with significant effects observed in experimental models, suggesting potential for development into official medicinal products pending further research.
August 2025 in “Current Issues in Molecular Biology” This study demonstrated that Periplaneta americana extract significantly promoted hair regeneration in depilated mice by enhancing superoxide dismutase activity, upregulating vascular endothelial growth factor, modulating the FOXO/PI3K/AKT pathway, and restoring skin microbiome balance, suggesting its potential as a novel therapeutic candidate for alopecia.
August 2023 in “Fermentation” This review discusses the potential of metabolic engineering to enable sustainable industrial-scale production of L-aspartate and its derivatives, detailing current microbial production progress, limiting factors, and future prospects with emerging technologies in synthetic biology.
In this preclinical study, PA-011 derived from Periplaneta americana showed significant hair regrowth effects in androgenetic alopecia mouse models by inhibiting inflammation and oxidative stress, activating hair follicle stem cell proliferation, and normalizing skin microbiota, suggesting promise as an AGA treatment.
5 citations
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October 2007 in “PubMed” This study discusses the effects of incorporating various amino acids in hair care products, noting improvements in hair surface properties and color retention when integrated with conditioners.
1 citations
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July 2023 in “Frontiers in Immunology” This review highlights the role of chronic stress, oxidative stress, and immune processes in the development of Hashimoto’s thyroiditis and polycystic ovary syndrome, emphasizing the potential of antioxidants in their treatment based on the existing literature.
7 citations
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February 2017 in “Open veterinary journal” This study suggests that deficiencies in certain amino acids, like taurine and tryptophan, in artificial milk formulas may contribute to skin and eye problems in Bengal tiger cubs.