TLDR Low zinc and selenium levels in sheep are linked to hair loss and thyroid problems.
The study "Diffuse Alopecia and Thyroid Atrophy in Sheep" examined five adult sheep with severe alopecia and thyroid abnormalities due to selenium and zinc deficiency. The sheep had below-normal thyroid hormone serum concentrations, smaller thyroid glands, and low zinc and selenium concentrations in both serum and liver. The study concluded that thyroid atrophy, alopecia, and hyperkeratosis in sheep are associated with low serum and liver concentrations of zinc and selenium. This is the first study to link zinc and selenium deficiencies to hypothyroidism in sheep. The study also found that the interaction between zinc and selenium deficiency results in more severe injuries than when these deficiencies occur separately. The researchers recommend mineral supplementation, especially zinc, during dry periods.
56 citations,
January 2013 in “International journal of trichology” Zinc supplements may be needed to treat hair loss in hypothyroidism.
44 citations,
July 2011 in “Dermato-endocrinology” Thyroid hormone affects skin health, with too little causing rough, pale skin and too much leading to smooth, thin skin, and may also impact wound healing and skin conditions.
September 2023 in “Medical and Clinical Case Reports” People with Alopecia Areata often have thyroid problems like Hashimoto thyroiditis and hypothyroidism.
December 2024 in “Nutrients” Skin, hair, and nail changes can help detect eating disorders early.
November 2019 in “Harper's Textbook of Pediatric Dermatology” The document is a detailed medical reference on skin and genetic disorders.
18 citations,
May 2016 in “Annals of Medicine” The article concludes that correctly diagnosing systemic causes of hair loss requires a detailed clinical evaluation and a systematic diagnostic approach.
14 citations,
April 2000 in “Animal Science/Animal science” Nutrients like vitamins, copper, zinc, and amino acids are crucial for healthy hair and wool growth.
