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This article reviews the effectiveness of adrenal cortex compounds E and F in treating various connective tissue disorders and reports no new clinical findings.

This study reported the first known occurrence of citrulline in an animal protein, specifically in the fibrous protein of hair follicle inner root sheaths.

This study found that keratins have evolutionarily conserved and domain-selectively enriched amino acids, which likely reflect their unique structural roles, with distinct patterns observed among epidermal, hair, and simple-type epithelial keratins.

This review discusses various amino acid-derived plant defensive compounds and highlights their potential as drug leads due to their potent antimicrobial properties, but reports no new experimental results.

This study found that all lesions in mice treated with a new topical formulation, WR 279,396, healed completely without relapse, outperforming other formulations and showing no toxicity.

In this study using zebrafish, four bisbenzylisoquinoline derivatives were found to protect hair cells from aminoglycoside-induced damage without reducing antibiotic efficacy, potentially leading to therapies for patients undergoing such treatments.

This study found that isotretinoin, a drug commonly used for acne, inhibits polyamine transport in Trypanosoma cruzi, leading to trypanocidal effects, and suggests its potential as a treatment for Chagas disease without affecting mammalian cell viability.

This study identified trichohyalin as an early differentiation marker in hair follicles, with potential structural roles related to alpha-helical formations, based on the partial characterization of its cDNA in sheep.

Argininosuccinic aciduria can cause hair loss.

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.

This study found that chemical treatments like perming, dyeing, and bleaching significantly alter amino acids and lipids in human hair, which may impact hair strength and quality.

This article discusses the interest in folic acid antagonists for leukemia treatment, noting their potential mechanism of interfering with cellular growth, but reports no new clinical results.

In this study, amitraz was found to be an effective and well-tolerated treatment for resolving sarcoptic mange in alpacas, demonstrating no relapse over a 10-month follow-up.

This study found that altered amino acid metabolism, specifically involving glutamic and aspartic acids, promotes neurovascular reactivity in rosacea, suggesting a potential metabolic target for treatment.

This study found that Annurca apple polyphenolic extracts reprogram hair follicle metabolism in mice, enhancing mitochondrial activity and keratin production while inhibiting some metabolic pathways.

This study found that a specific amino-pyridine compound showed potent androgen receptor antagonist activity, stimulating hair growth in mice and reducing sebum production in a hamster model.

This study found that a histochemical stain using 4-dimethyl-aminocinnamaldehyde effectively distinguishes between plucked anagen and telogen hairs by causing the root ends of anagen hairs to develop a red color.

This case study reports that the topical application of mometasone furoate ointment successfully reduced eruptions and promoted hair regrowth in a patient with amicrobial pustulosis.

This study examined hair curvature in Japanese women, finding that 47% have curved hair, and identified structural differences in hair fiber, which resemble those in wool fibers.

This study found that N‐AOHPA was particularly effective as a silicone emulsifier for improving the condition of damaged hair by preventing amino acid dissolution from bleached hair.

In this study on mice with severe thermal skin burns, researchers found that administering 4-aminopyridine (4-AP) helped reduce inflammation and apoptosis, promoted angiogenesis, and accelerated wound healing by enhancing specific cellular behaviors and signaling pathways.

This study found a previously unreported ST14 gene mutation in a patient with ichthyosis-hypotrichosis syndrome, highlighting novel skin and hair characteristics and emphasizing the critical role of the Asp482 amino acid in matriptase activation.

A new method was created to accurately measure minoxidil and aminexil in hair loss treatments.

In this study, researchers identified a novel STS gene (c.287G > A; p.W96*) mutation in Pakistani individuals with X-linked ichthyosis, expanding the understanding of its genetic causes and aiding in genetic counseling.

This review focuses on the roles of amino acids, peptides, and proteins in cosmetics, highlighting their importance in skin health and their potential for development in personal care products due to their unique properties and biocompatibility.

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.

This study found that concurrent administration of cycloleucine with ethionine prevented the weakening of wool fibers in sheep, whereas reduced glutathione did not have the same effect.

This study developed a reliable RP-HPLC-DAD method, finding that amino acid concentrations in bleached hair decrease with higher hydrogen peroxide levels, notably affecting cystine.

This study suggests that the amino acid composition of fibrous proteins in normal human hair is similar to that of stratum corneum proteins, particularly in cysteine and glycine content.

Metabolic disorders can cause hair structure defects and growth issues, but amino acid levels in hair remain normal.