21 citations
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January 2009 in “Indian journal of dermatology, venereology, and leprology” Vitamin B12, folate, ferritin, and iron levels are not linked to alopecia areata.
16 citations
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January 2017 in “DOAJ (DOAJ: Directory of Open Access Journals)” This study found that premature hair graying is strongly associated with a family history, Vitamin B12 deficiency, and hypothyroidism, with onset as early as 5 years in patients in Gurugram, India.
10 citations
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January 2012 in “International Journal of Trichology” This study found no significant association between serum levels of vitamin B12, folate, TSH, ferritin, zinc, or anxiety scores and trichodynia in telogen alopecia patients.
13 citations
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May 2012 in “Cutaneous and ocular toxicology” In this study, researchers found no significant differences in vitamin B12, folate, and homocysteine metabolism between patients with alopecia areata and controls, suggesting no association with vitamin B12 deficiency.
July 2022 in “Journal of Dermatology and Dermatologic Surgery” This study found that Vitamin B12 deficiency was more common in patients with chronic telogen effluvium than in healthy controls.