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This study found that bleaching, dyeing, and UVA/Vis radiation caused significant cuticle damage and protein loss in both Caucasian and Afro-ethnic hair, highlighting the aggressive nature of these treatments.

In this study, tresses treated with pH 1.0 acid straightener showed better straightening but more damage to hair properties compared to those treated with pH 2.0.

This study found that the acidic hair straightening formulation at pH 1.0 improved hair alignments and straightening effectiveness more than pH 2.0, but it weakened fiber strength and affected hair color and composition.

This study found that UV radiation exposure increased protein elution and altered protein characteristics in hair fibers, suggesting environmental factors impact hair shaft proteins.

This study observed that tryptophan levels in human hair are higher in males than females, increase with age, and vary with hair color, being highest in grey and white hair.

This study found that Arabidopsis mutants with disrupted auxin conversion pathways displayed low auxin phenotypes and increased biosynthetic gene expression, suggesting a feedback mechanism maintains auxin homeostasis.

In this study, researchers found that high-dose tryptophan ingestion before symptom onset may be linked to clinical features resembling eosinophilia-myalgia syndrome in patients with eosinophilic fasciitis.

This study suggests that ultra-fine powders of steamed and lyophilized mature silkworms may have enhanced pharmacological effects compared to fine powders, possibly due to their smaller particle size.

Merino wool fibers change shape with moisture, while human hair shape stays the same.

This study provides evidence that human skin contains genes and enzymes necessary for producing serotonin and melatonin.

This study identified over 40 phytochemical compounds in the leaves and flowers of Bituminaria bituminosa, predominantly glycosylated flavonoids from apigenin, using advanced chromatographic techniques.

This case report illustrates that pellagra can develop in patients with anorexia nervosa without typical signs of severe malnutrition, responding rapidly to nicotinamide and tryptophan therapy.

This review suggests systemic changes in polycystic ovary syndrome may increase the risk of neurodegeneration, potentially linking it to Alzheimer's disease through common pathways affecting tryptophan metabolism.

This study reviews various factors affecting mesenchymal stem cell transplantation efficacy, including platelet concentrate composition, donor characteristics, and environmental influences, and examines strategies for optimizing outcomes through preconditioning and combined therapies in regenerative medicine.

This study found that overexpression of the SbbHLH85 gene in sweet sorghum increases root hair growth and Na+ absorption, but negatively affects salt tolerance.

This study utilized advanced imaging techniques to quantify hair damage and dye uptake dynamics, revealing that compound penetration in hair is influenced by molecule size and lipophilicity.

This review provides a comprehensive overview of melatonin's physiological roles, effects, and clinical implications, but it does not present new experimental findings.

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.

This article discusses the potential role of melatonin in protecting skin against stress and maintaining homeostasis, based on its local synthesis and various protective functions, but presents no new clinical results.

This study reports that riboflavin may increase enzymatic activity in a GCDH-deficient patient with specific mutations, but doesn't fully normalize urinary organic acid levels.

This study reports the development of a novel protocol to purify human TRPV3 ion channels, revealing functional properties and differences in ligand interactions, enabling further structural and functional research.

This review discusses the emergence and impact of eosinophilia-myalgia syndrome related to L-tryptophan and offers insights into environmental factors affecting sclerodermatous conditions, with no new research findings presented.

This study found that piglets' rapid growth during nursery and lactation was linked to changes in microbiota composition and increased cortisol conversion, highlighting critical early life factors influencing adult microbiota establishment.

This study observed that lower serum copper levels may be linked to premature hair graying in young patients compared to controls.

This study explored non-invasive methods for monitoring low molecular weight biomarkers on the skin's surface, concluding that certain amino acid ratios, such as Phe/Trp, could serve as potential indicators of skin inflammation and cancer.

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.

This study found that using histidine-tryptophan-ketoglutarate solution with adenosine triphosphate and deferoxamine for hair graft preservation significantly reduced postsurgical shedding compared to Ringer solution, enhancing patient satisfaction.

This study found that Platycladus orientalis flavonoids may reduce oxidative damage and slow melanin degradation in AGA-affected hair, improving its quality.

This study found differences in melanin content and gene expression in skin under black and white hair of giant pandas, providing a basis for further research on hair color distribution and skin diseases.

In this study, researchers found histopathological similarities between L-tryptophan eosinophilic myalgia syndrome and idiopathic eosinophilic fasciitis, with certain unique inflammatory features present in the former.