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Featured article | August 2024

The Nutritional Relationships of the Thyroid

David L. Watts, D.C., Ph.D., F.A.C.E.P.

Journal of Orthomolecular Medicine Vol. 4, No. 3, 1989

Discussed in the article:

  • An estimated 40% of the American population suffers from thyroid dysfunction, with hypothyroidism being the most common issue.
  • Subclinical hypothyroidism is more prevalent than clinical hypothyroidism, often going undetected in standard tests.
  • Various conditions are linked to severe clinical thyroid insufficiency, such as myxedema, arteriosclerosis, and hyperlipidemia. Symptoms of subclinical hypothyroidism include fatigue, depression, and cold sensitivity.
  • Nutritional deficiencies that contribute to thyroid dysfunction include:
    • iron (deficiency affecting up to 60% of hypothyroid patients)
    • phosphorus, manganese, magnesium, potassium, sodium, and chromium
    • vitamins A, B1, B5, B6, and C
  • Natural and environmental inhibitors of thyroid function include:
    • certain foods, including cruciferous vegetables, almonds, yams, etc.
    • vitamin B12 and cobalt
    • vitamin D and calcium
    • lithium (therapeutic medical dosing)
    • bromine
    • iodine (See ISOM Hypothyroidism page for discussion of the need for selenium with iodine supplementation)
    • estrogen, insulin

“Subclinical hypothyroidism could be described as a syndrome rather than a disease and is characterized by fatigue, depression, cold sensitivity, and changes in the skin and hair texture.”

“The incidence of anemia is estimated to affect up to 60% of those patients with hypothyroidism and is not related to severity or duration of thyroid insufficiency.”

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