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In this study, researchers observed that cosmetic peroxide bleaching causes oxidative damage and protein loss in human hair, not only affecting the cuticle but also deeper cortical structures, correlating with bleaching severity.

This study found that the new cocrystal formulation KET-PABA improved the antimycotic efficiency of ketoconazole and induced an anti-inflammatory response without causing skin sensitization in mice.

This study found that topical application of copper (II) albumin complex improved healing signs in rats with full thickness thermal burns, enhancing antioxidant, anti-inflammatory, and pain modulating effects.

This case study of a 2-month-old boy with maple syrup urine disease highlights the dangers of restricting branched-chain amino acid intake, as it led to acrodermatitis dysmetabolica-like skin eruptions and hair loss, later resolved with careful dietary adjustments and monitoring.

This case report describes a 2-year-old boy diagnosed with trichothiodystrophy, characterized by fragile hair, intellectual damage, diminished fertility, and short stature.

In this study, APC collagen peptides were observed to enhance hair elasticity and gloss in human hair follicles by increasing amino acid and lipid component levels, suggesting their potential benefits for improving hair qualities.

This study found that supplementing with 1.5% α-ketoglutaric acid significantly improved the performance, hair follicle density, and antioxidant capacity in Rex rabbits, potentially by enhancing the Wnt signaling pathway and reducing amino acid catabolism.

This study found that patients with tropical chronic pancreatitis exhibited significantly reduced plasma amino acid levels and antioxidant capacity, with folate deficiency identified as a key factor in hyperhomocysteinemia.

This study found that a hair conditioner using peptides from Pneumatophorus japonicus heads improved damaged hair's structure, gloss, and smoothness more effectively than a commercial wheat protein conditioner by increasing amino acid content and interacting with hair keratin.

This study reports that polyphenols from Annurca apples may safely promote hair growth and protect against chemotherapy-induced alopecia without interfering with chemotherapy regimens.

In this study, researchers identified a novel p.R50X mutation in the vitamin D receptor gene, linked to hereditary vitamin D-resistant rickets in two siblings.

This research studied European human hair, finding that cysteic acid and protein carbonylation increased with both chemical and photochemical oxidation. Protein carbonylation was highlighted as a more sensitive marker for photochemical oxidation, providing better in situ visualization of hair damage than cysteic acid.

A new mutation in the HR gene causes hair loss in a specific family.

In this study, researchers analyzed a herbal shampoo containing Momordica charantia extract and Hibiscus Rosa-Sinensis, noting it could support collagen development and hair growth. The shampoo, tailored to various hair and scalp conditions, was confirmed free of certain harmful heavy metals.

This review discusses the role of biotin in metabolism and its dietary requirements, but provides no new experimental findings.

This summary outlines the essential roles and recommended daily intakes of biotin, while discussing consequences and mechanisms of deficiency, but presents no new research findings.

This review highlights that while vitamin and mineral supplementation shows limited impact on hair loss treatment, deficiencies in iron, zinc, and vitamin D are common among patients with telogen effluvium.

In this study, Lactobacillus reuteri and Bacillus natto were found to potentially replace Aureomycin in alleviating weaning stress in piglets, based on growth, diarrhea rate, immunity, and other health indicators.

This study found that ultrasonication pre-treatment at various power levels improved the color, protein solubility, and degree of hydrolysis of fish protein hydrolysates from mackerel side streams, and potentially reduced bitterness by decreasing hydrophobic free amino acids.

This study identified polymorphisms in HGT-KRTAP7-1 and KRTAP8-1 genes in Argentine llamas that may impact fiber characteristics by altering amino acid residues critical for keratin-associated protein properties.

In a study conducted on mice, researchers observed that exposure to ionizing radiation led to significant metabolic imbalances, including dyslipidemia and disruptions in amino acid metabolism, with activated protein C providing partial protection by normalizing certain plasma metabolites and lipids.

This case report describes two patients with trichothiodystrophy who exhibited a different pattern of hair protein composition changes, suggesting a subgroup of TTD characterized by partial loss of high-sulfur proteins without significant alteration in their amino acid composition.

In this study, elevated mRNA levels for serine-rich ultra high sulfur proteins were observed during active hair growth phases in mice, particularly in the forming hair structures and upper skin layers.

In this study, researchers found that male and female APCHi mice exposed to ionizing radiation showed near-normal lipid and metabolite levels, suggesting activated protein C may offer some protective effects against radiation-induced damage affecting organ systems.

This study found that ringtailed lemurs consuming leucaena in Berenty absorb mimosine, which causes alopecia without affecting body condition or organ toxicity; this may increase infant mortality due to alopecic mothers.

In this study, researchers identified a unique Arg30stop mutation in the vitamin D receptor gene that causes hereditary vitamin D-resistant rickets in a young French-Canadian boy by truncating the receptor and causing hormone resistance.

This study reported a case of hereditary vitamin D–resistant rickets caused by a single heterozygous missense mutation in the VDR gene, showing dominant-negative effects and reduced response to 1,25-dihydroxyvitamin D3.

This study found that in Liaoning cashmere goats, the BMP4 gene shows increased transcription from the anagen stage to telogen, and higher gene methylation correlates with reduced expression in skin tissue.

This study found that 60% of examined prostate tumors had new somatic substitutions in the SRD5A2 gene, affecting enzyme activity and potentially influencing prostate cancer progression.

This review provides an overview of biotin's role in metabolism and the consequences of deficiency but reports no new clinical findings; it highlights that intestinal bacteria usually meet biotin needs.