Researchers are now discovering the link between vitamin D deficiencies and thyroid problems. Vitamin D is necessary for thyroid hormone production in the pituitary gland, and possibly in the early stages of T-3 (thyronine) binding to its receptor. Too little circulating vitamin D may hinder the body’s ability to produce and regular thyroid hormones.

Modern diets usually do not provide adequate amounts of vitamin D, partly because of the trend to low fat foods and partly because we no longer eat vitamin-D-rich foods like naturally reared poultry and fatty fish such as kippers, and herring. Often we are advised to consume the egg white while the vitamin D is in the yolk or we eat the flesh of the fish avoiding the D containing skin, organs and fat. These reductions in food sources and sun avoidance contribute to escalating D deficiencies. Vegan diets are exceptionally poor or completely lacking in vitamin D predisposing to an absolute need for UV-B sunlight. So in essence, using food as your primary source of D makes it about impossible to acquire adequate amounts for good health.
Poultry and eggs contain varying amounts of vitamin D obtained from insects, fishmeal, and sunlight containing UV-B or supplements. Fish, unlike mammals, birds and reptiles, do not respond to sunlight and rely on vitamin D found in phytoplankton and other fish. Salmon must feed on phytoplankton and fish in order to obtain and store significant vitamin D in their fat, flesh, skin, and organs. Thus, modern farm-raised salmon, unless artificially supplemented, may be a poor source of this essential nutrient.

Proper Vitamin D levels are essential for your health especially if you have thyroid problems.  Screening for Vitamin D deficiency is recommended for all thyroid patients. In addition to my other vitamins and nutrients, I just added liquid vitamin D3 drops to my daily regimen. I’m taking 5 drops at 5,000 IUs twice a day in water.