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Mink use L-methionine and L-cystine slightly better than natural amino acids for hair growth, but D-methionine is not effective.

This study found that ethionine significantly inhibited wool growth in sheep, with L- and D-isomers being equally effective, but did not cause hair loss in sucking mice or rats.

This study found that a compound additive improved the growth and fur quality of blue foxes, with a 28.7% increase in weight gain and longer pelt lengths compared to the control group.

In this study, a low-methionine diet significantly improved the health and physical traits of cystathionine β-synthase-deficient mice, contrasting with negative effects on mice with partial deficiency.

This study observed that while betaine supplementation decreases total homocysteine and increases methionine levels in a mouse model of CBS deficiency, it is not as effective as methionine restriction in reversing associated phenotypes.

This study identified a mutation in the steroid-binding domain of the androgen receptor gene associated with complete androgen insensitivity syndrome, impairing male sexual development due to altered androgen receptor protein function.

This study observed that selenium retention in rat hair and nails was influenced by the chemical form of dietary selenium and methionine status, suggesting caution when using these tissues to assess selenium status.

This review discusses dietary manipulation strategies in a mouse model of CBS deficiency and reports no new results; the authors emphasize the importance of understanding gene-diet interactions.

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 demonstrated that mink hair growth and pelt quality significantly depend on dietary protein levels and DL-methionine supplementation during the growing-furring period.

In this study, mice on a methionine-deficient diet experienced hair loss, which was not remedied by homocysteine supplementation; hair regrowth only resumed after methionine was reintroduced, suggesting dietary methionine is essential for hair maintenance.

This review discusses the molecular role of the vitamin D receptor in regulating various biological actions such as bone mineralization and reports no new clinical results, highlighting the complexity of vitamin D's function in multiple tissues.

In this study, homozygous VDR null mutant mice exhibited nonfunctional vitamin D receptors, leading to growth abnormalities and revealing the limited physiological importance of vitamin D pathways outside the classical receptor.

This review discusses the association between vitamin D receptor polymorphisms and polycystic ovary syndrome, noting the need for further research on their impact on the disorder's manifestations.

This study found that homocysteine-keratin accumulation in human hair increases towards the tips, linked to copper/iron-catalyzed demethylation of methionine, and may contribute to keratin damage.

This research observed that, in domestic cats like Maine Coon and Rex breeds, a "piebald" coat color pattern is likely influenced by the Silver locus, although the specific mutations involved are yet to be published.

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.

This review summarizes the potential of N-acetyl-cysteine in managing diseases linked to redox imbalance, discussing its effects from cellular mechanisms to clinical applications, though further research is suggested for broader use.

This study identified a novel V26M mutation in the vitamin D receptor as the cause of hereditary vitamin D resistant rickets in a patient, characterized by severe rickets and an unusual pattern of alopecia.

This study found that L-cystine, D-pantothenat, and miliacin can enhance the metabolic capacity and proliferation of human keratinocytes, with a combination of these additives potentially providing synergistic benefits in growth media.

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.

This review discusses the potential role of oxidative stress in hair graying and age-related alopecia, emphasizing the need for new strategies to counteract these effects, but reports no new results.

This article explores how various nutrients and metabolic processes impact wool and hair follicle function in animals but reports no new experimental findings.

This review discusses studies on hair growth and protein synthesis in hair follicles, highlighting the differing responses of mohair and cashmere goat follicles to signaling molecules, biotin, and amino acids, but contains no new results.

This study described the clinical and genetic features of two Iranian siblings with hereditary vitamin D resistant rickets, identifying a specific VDR gene mutation contributing to their symptoms.

This study found that wet cupping blood differs significantly from venous blood in metabolite profiles, implying distinct biochemical pathways may be involved.

This article describes a clinical case of a 67-year-old patient with telogen effluvium treated with a supplement containing amino acids, vitamin E, iron, and Serenoa repens, but reports no new clinical findings.

This narrative review describes the components of human hair and their nutritional importance but reports no clinical results; the authors suggest dietary sulfur amino acids are essential for hair health.

This review explores the diverse physiological roles of the vitamin D endocrine system, discussing current research on receptor structure, transcription details, murine models, and alternative receptors, but reports no new findings.

This abstract reviews the characteristics and health risks associated with polycystic ovary syndrome and does not report new findings, highlighting the syndrome's multifactorial nature.