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This article proposes five different mechanisms for telogen effluvium, supported by clinical findings, based on changes in different phases of the hair cycle.

This study found that the mammalian hairless gene encodes a corepressor protein that interacts with thyroid hormone receptors, providing insights into hair loss syndromes in humans and mice.

This article reviews the concept of telogen effluvium and emphasizes the importance of identifying triggers and using diagnostic investigations to determine the cause of hair loss, without reporting new results.

HPT axis hormones boost mitochondrial function and growth in hair follicles, potentially aiding hair health.

This review examines the neuroendocrine mechanisms underlying seasonal changes in mammals and highlights areas needing further research, reporting no new experimental results.

Hair loss that spreads out can often fix itself or be treated by finding and handling the cause.

This review discusses telogen effluvium, a common type of hair loss, focusing on differentiation from other conditions and potential causes, but presents no new research findings.

This review discusses diagnostic approaches for women with diffuse, nonscarring hair loss and reports no new clinical results.

Some drugs can cause hair loss, and stopping these drugs often leads to hair regrowth.

This study reported that Malassezia-associated dermatitis can cause pruritus in cats with feline paraneoplastic alopecia.

This study found that the hairless gene in mice has a more extensive role in development than previously thought, as indicated by its expression in various tissues and associated abnormalities in hr/hr mutants.

This review discusses hormonal influences on hair growth and suggests that understanding hormone-gene interactions may improve treatment of hirsutism and alopecia, but reports no new clinical findings.

This study identified a novel G207E STING mutation associated with severe inflammatory symptoms and suggested that common polymorphisms in TMEM173 and IFIH1 may modify the phenotype in affected individuals.

This article reviews the historical development of understanding the hair growth cycle, particularly anagen, catagen, and telogen phases, and reports no new clinical findings.

This review discusses the significant burden of disease and psychosocial implications associated with alopecia, highlighting its comorbidities and the impact on quality of life despite being viewed traditionally as an aesthetic concern, but reports no clinical results.

This study recommends limiting routine thyroid function screening to children with alopecia areata who have medical histories of Down syndrome, atopy, or family histories of thyroid disease.

This study observed that patients with pemphigus have a higher incidence of hypothyroidism, inflammatory bowel disease, and diabetes compared to the general population.

This study found that thyroxine modulates peripheral molecular clock gene expression in human hair follicles, which may have implications for treating clock-related diseases in patients with thyroid dysfunction.

This study identified the Hairless (Hr) gene-encoded protein as a corepressor that plays a crucial role in maintaining skin and hair by regulating epithelial stem cell differentiation and gene expression via chromatin remodeling, which may impact both development and disease.

This article reviews studies on thyroid influence on hair growth, noting varied results, including accelerated growth in some normal and underfed rats after thyroid administration, but reports no clinical results.

This study suggests that hormonal changes may contribute to the persistent symptoms of long COVID, with specific patterns observed in serum hormone levels related to fatigue and sensory dysfunction.

This study demonstrated that thyroid hormone receptors play a crucial role in hair growth and skin health, as mice lacking these receptors showed impaired hair cycling and wound healing.

This study observed that chemically-induced intersex frogs displayed altered brain mRNA profiles, with finasteride increasing certain hormone-related gene expressions and fadrozole reducing aromatase activity without affecting gene transcript levels.

This article reviews various causes of hair loss linked to systemic factors, noting that careful history and examination can lead to accurate diagnosis, but reports no new clinical results.

This study observed that patients with alopecia areata often have comorbidities and experience significant healthcare costs, with treatments like systemic therapies being infrequently used.

This review discusses the impact of COVID-19 on the endocrine system and reports no clinical results; the authors emphasize the need to investigate endocrine damage during and after COVID-19 infection.

This study found significant hormonal differences, including elevated cortisol and androstenedione levels, in both male and female androgenic hair loss patients compared to controls, suggesting complex hormonal interactions in the condition.

This study hypothesizes that postinflammatory hyperpigmentation in ashy dermatosis may result from basal cell apoptosis, as evidenced by consistent histologic findings across nine patients.

In this study, a very-low-calorie diet led to greater weight loss and improvements in hyperandrogenaemia and metabolic markers in obese women with polycystic ovary syndrome compared to a moderate energy deficit approach over eight weeks.

This article discusses nutritional contributions to hair health and highlights the need for identifying risk factors for deficiencies but reports no new clinical findings.