May 2013 in “DOAJ (DOAJ: Directory of Open Access Journals)” This study found that women with hair loss had significantly higher free testosterone levels compared to those without hair loss.
115 citations
,
August 2008 in “The Journal of Clinical Endocrinology & Metabolism” In this study, T3 and T4 were found to directly influence human hair follicles in vitro, enhancing keratinocyte proliferation, prolonging the hair growth phase, and affecting pigmentation.
95 citations
,
August 2013 in “Journal of Investigative Dermatology” HPT axis hormones boost mitochondrial function and growth in hair follicles, potentially aiding hair health.
42 citations
,
July 2010 in “European Journal of Cell Biology” This study found that thyroid hormones T3 and T4 enhance keratin 15 promoter activity and stimulate CD200 expression in epithelial stem cells from human scalp hair follicles, affecting their growth and differentiation.
32 citations
,
March 2021 in “Journal of endocrinological investigation” This review covers the connection between thyroid diseases and skin conditions like alopecia, dermatitis, and vitiligo, and highlights the need for further research on the role of thyroid hormones in skin health.
30 citations
,
October 2012 in “Current Opinion in Endocrinology, Diabetes and Obesity” This review discusses the effects of thyroid hormone on the skin and explores the potential for using it to treat skin diseases, but reports no new clinical results.
16 citations
,
May 1998 in “International Journal of Dermatology” This study found that elevated serum cortisol levels and other immunological changes are significantly involved in the active phases of psoriasis eruptions.
11 citations
,
January 2020 in “World Journal of Traditional Chinese Medicine” This study used a glucocorticoid-injection model to mimic kidney-yang deficiency syndrome and reported symptoms related to hormonal imbalances in the hypothalamic-pituitary-target gland axes.
9 citations
,
July 2020 in “Experimental Dermatology” This review emphasizes the potential of repurposing topical L-thyroxine for skin ulcers and telogen effluvium and highlights the need for further exploration of its use in dermatology.
2 citations
,
June 2014 in “مجلة مركز بحوث التقنيات الاحيائية” This study reported that patients with PCOS and thyroid hormone disturbances had specific TPO gene mutations and differing thyroid hormone levels compared to those without disturbances or healthy controls.
August 2022 in “Italian Journal of Animal Science/Italian journal of animal science” This study found that supplementing Angora goats with whole field bean seeds postpartum did not prevent weight and body condition losses but was associated with improved mohair growth and kid weight gain, likely due to better nutrient partitioning towards lactation and hair growth.
July 2024 in “Journal of Investigative Dermatology” Topical thyroid hormones may boost hair growth.
This study suggests that topically applied thyroid hormones T3 and T4 promote hair growth on human scalp tissues ex vivo, highlighting potential therapeutic use for hair loss conditions like androgenetic alopecia.
June 2024 in “Biological and Clinical Sciences Research Journal” In this study, researchers found that women with PCOS and thyroid dysfunction had significantly altered T3 and T4 hormone levels and more frequent symptoms like weight gain and irregular menstrual cycles, suggesting the importance of thyroid screenings for personalized treatment strategies.
51 citations
,
May 1996 in “American journal of physiology. Regulatory, integrative and comparative physiology/American journal of physiology. Regulatory, integrative, and comparative physiology” In this study, captive gray seals exhibited increased resting metabolic rates and elevated thyroid hormone levels during the final stage of molting, with more pronounced changes in juveniles.
1 citations
,
January 2022 in “Open Journal of Endocrine and Metabolic Diseases” This case report describes a 70-year-old woman with pituitary resistance to thyroid hormone (PRTH) misdiagnosed as Graves disease, highlighting diagnostic challenges in managing this rare disorder.
October 2025 in “Diseases” This study reports that women with hair loss had significantly lower levels of several biomarkers, including hemoglobin, iron, copper, selenium, vitamin D, vitamin B12, folate, and thyroid hormones, compared to healthy controls.
October 2024 in “Journal of the Pakistan Medical Association” This letter discusses the various risk factors associated with premature greying of hair, highlighting genetic predispositions, nutritional deficiencies, stress, and lifestyle factors, while noting a lack of conclusive data on effective interventions, as detailed in the reviewed studies.
January 2026 in “The Pharma Innovation” This article discusses hypothyroidism, its symptoms, causes, and the importance of lifestyle modifications in supporting thyroid health, but it reports no new clinical results.
March 2021 in “World rabbit science” This study found that taurine dietary supplementation could reduce lipid metabolism, enhance antioxidant capacity, and improve hormone levels in Angora rabbits, with 0.2% taurine increasing wool production.
October 2022 in “International Journal of Research in Dermatology” This study suggests that hormonal disturbances play a role in female pattern hair loss and that trichoscopy may be a useful tool for diagnosis and differentiation from other conditions.
1 citations
,
April 2020 in “bioRxiv (Cold Spring Harbor Laboratory)” This study suggests that seasonal rhythm genes in cashmere goat skin are differentially expressed with changing daylight, potentially affecting hormone transformation and light sensitivity.
January 2026 in “International Journal of Advanced Biochemistry Research” This case report describes a 4-year-old dog successfully managed for primary hypothyroidism and concurrent Babesia gibsoni infection, treated with thyroxine, Diminazine aceturate, antibiotics, and supportive therapies, resulting in clinical improvement and negative blood smear for Babesia by day 30.
35 citations
,
August 1978 in “Australian Veterinary Journal” In this study, a sole diet of Leucaena leucocephala caused hypothyroidism and poor weight gain in steers, but mineral supplementation improved some symptoms without normalizing thyroid hormone levels.
30 citations
,
March 2015 in “PLoS ONE” 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.
22 citations
,
June 2005 in “Clinical Oncology” This case report documents an instance of symptomatic hypothyroidism developing in a patient with papillary thyroid carcinoma after beginning treatment with orlistat.
12 citations
,
January 1999 in “Journal of Animal Science” This study observed that combined treatment with thyroxine and hydrocortisone increased lipid accretion and fat cell development in hypophysectomized fetal pigs, suggesting a key role of these hormones in fetal adipogenesis.
8 citations
,
March 1942 in “Journal of Endocrinology” This study found that growth in rats hindered by thyroid removal at birth can be normalized through the administration of thyroid preparations like thyroxine and artificial thyroprotein.
7 citations
,
January 2011 in “Veterinary Pathology” In this case report, a 9-year-old horse was diagnosed with alopecia areata contributing to Malassezia dermatitis, involving lymphocyte infiltration and symptoms consistent with yeast presence.
6 citations
,
January 2015 in “Indian Dermatology Online Journal” This study observed that an overdose of levothyroxine in a hypothyroid infant led to rapid hair loss, which improved after reducing the medication dose.