105 citations
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February 2010 in “Endocrinology” The skin produces and responds to thyroid-stimulating hormone, which is controlled by other thyroid-related hormones.
90 citations
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December 2008 in “Journal of Investigative Dermatology” Thyroid-stimulating hormone affects hair follicles but doesn't change hair growth or color.
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.
October 2023 in “Clinical medicine and medical research” Thyroid function may influence hair loss after COVID-19.
March 2014 in “Journal of The American Academy of Dermatology” Vitamin D deficiency is common in temporary hair loss, and stress is often a suspected cause.