September 2020 in “Osmangazi tıp dergisi” Thyroid dysfunction, vitamin D and B12 deficiencies, and iron deficiency may be linked to hair loss condition Telogen Effluvium.
Low vitamin D3 is not linked to different levels of thyroid hormones in people with autoimmune thyroid disease.
November 2023 in “International Journal of Trichology” No significant link between hair loss and iron or thyroid levels was found, but checking for deficiencies might still be useful.
February 2019 in “Americanae (AECID Library)” Selenium and zinc deficiency in sheep leads to thyroid and skin problems.
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January 2013 in “International journal of trichology” Zinc supplements may be needed to treat hair loss in hypothyroidism.