![]() This can lead some patients to believe that iodine supplementation is not working for them when, in fact, it may be due to their iron status instead. Meaning the lower your iron levels are the less likely you are to utilize iodine if you are supplementing with it. In addition, low iron has been shown to impact the effects of iodine supplementation (7). In other words, this important enzyme requires iron to function. Heme-dependent is another way to say iron-dependent. ![]() When it comes to thyroid hormone production, iron is required due to its effects on heme-dependent thyroid peroxidase. Transferrin saturation is a lab test that tells you how much of the serum iron in your body is bound versus unbound.Ī low transferrin saturation indicates low serum iron levels in the body. You can see the inverse relationship between transferrin saturation and the TSH.Īs your transferrin saturation falls (6), the TSH rises indicating a state of hypothyroidism.Ī high TSH means low thyroid and a low TSH means high thyroid. The association between iron and TSH level is clearly defined in the graph below: This may explain why some patients still experience the symptoms of hypothyroidism despite taking their thyroid hormone medication. Iron deficiency reduces how much of that hormone your body can produce. Not only is iron required for the creation of thyroid hormone (4), but low iron levels are also associated with low levels of free T3 (5).Īs a thyroid patient, you are probably well aware that T3 is the single most important and powerful thyroid hormone in your body. Iron is required for proper thyroid function. How iron impacts thyroid medication absorption and other supplements.When to supplement with iron and which types of supplemental irons work best.What level of iron is optimal for thyroid function.How to test both your iron levels and iron storage levels.Why iron is so important for thyroid function.Patients who have hypothyroidism deserve special attention and treatment if their iron stores are low because of how important iron is for thyroid hormone function (2). When it comes to thyroid function, the measure of your iron stores (and not your serum iron levels) is more important. Most doctors are trained to look for iron deficiency anemia (1).īut what they do miss is suboptimal iron levels as measured by ferritin. Not only is it common, but it is frequently misdiagnosed and/or missed by doctors. ![]() ![]() It’s up there with B12 deficiency, magnesium deficiency, and vitamin D deficiency. Iron deficiency is one of the most common nutrient deficiencies seen in hypothyroid patients. Did you know that iron deficiency may be one of the reasons your thyroid symptoms remain out of control even while taking thyroid medication? ![]()
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