January 2024 in “Medicine” This retrospective study of 500 female patients with telogen effluvium found that those with hypothyroidism had more severe hair loss compared to those with normal thyroid function or hyperthyroidism, highlighting the importance of thyroid function testing in these cases.
November 2023 in “Journal of Cosmetic Dermatology” This study found that patients with non-scarring alopecia, such as androgenetic alopecia and female pattern hair loss, have lower serum levels of 25-hydroxyvitamin D and a higher incidence of vitamin D deficiency compared to healthy controls.
This study reviewed existing literature to demonstrate that thyroid disorders have a significant and underestimated impact on hair loss, highlighting gaps in current knowledge and the need for further research to better diagnose and manage hair disorders linked to thyroid dysfunction.
1 citations
,
April 2021 in “International Journal of Research in Dermatology” This study found low serum ferritin and vitamin B12 levels in a significant portion of women with chronic telogen effluvium, while vitamin D deficiency was less common.
January 2021 in “Turkiye Klinikleri Journal of Dermatology” This study found that male patients with hair loss often had lower levels of vitamins D and B12, suggesting these deficiencies should be tested for in treatment evaluations.
6 citations
,
January 2020 in “Postepy Dermatologii I Alergologii” This article recommends assessing serum ferritin and vitamin D levels in patients with diffuse hair loss before starting treatment, but it reports no new clinical results.
45 citations
,
April 2019 in “International Immunology” This review discusses the mechanisms behind alopecia areata and primary cicatricial alopecia and reports no new clinical results, aiming to guide the development of targeted treatments.
134 citations
,
December 2018 in “Dermatology and Therapy” This review discusses the potential role of vitamins and minerals in managing non-scarring alopecia but reports no clinical results; the authors advocate for further controlled trials to explore these relationships.
13 citations
,
April 2018 in “Journal of The American Academy of Dermatology” This study found that 64.8% of patients with different types of alopecia had vitamin D deficiency, and those with lichen planopilaris and telogen effluvium had higher odds of severe deficiency compared to patients with alopecia areata.
114 citations
,
October 2017 in “American journal of clinical dermatology” Adequate vitamin D is crucial for skin health and should be considered in dermatology.
63 citations
,
May 2017 in “American Journal of Clinical Dermatology” This review found that patients with alopecia areata may have lower levels of vitamin D, zinc, and folate, but conflicting evidence precludes definitive clinical recommendations for micronutrient supplementation.
15 citations
,
October 2016 in “PubMed” This study found that vitamin D, ferritin, and zinc deficiencies are prevalent among patients with telogen effluvium in the greater Pittsburgh area, suggesting these should be included in initial evaluations.
48 citations
,
May 2013 in “Canadian Medical Association Journal” This article discusses common causes of hair loss, specifically androgenetic alopecia and alopecia areata, but reports no new clinical findings.
185 citations
,
June 2011 in “Molecular and cellular endocrinology” This review discusses the regulation and function of vitamin D and its receptor in skin cells, highlighting their roles in processes such as proliferation inhibition, differentiation, and innate immunity, but reports no new results.
12 citations
,
February 2010 in “Journal of the European Academy of Dermatology and Venereology” Some people with chronic hair loss may have thyroid autoimmunity.
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.
207 citations
,
April 2006 in “Journal of The American Academy of Dermatology” This review discusses the complexities of diagnosing and treating iron deficiency related to nutritional anemia and hair loss, concluding that routine screening and supplementation for hair loss are not yet supported by sufficient evidence.
239 citations
,
July 2002 in “Clinical and Experimental Dermatology” This review explores the role of nutritional factors in hair loss, noting that iron and l-lysine supplementation may benefit some individuals, while excessive supplements can lead to hair shedding.