Iodine

IODINE

Iodine concentration in humans is quite variable because it is strongly influenced by the iodine content of the grains, vegetables, fruits, fish, seafood, and meats eaten. This depends upon the iodide content of the soil and the plants which are then consumed directly by humans and also the animals they eat. Iodide is the ionic form of iodine and the way it is usually found and functions. Iodide is also found in drinking water and is influenced by the rocks and soils of the specific region.

Though it capable of permeating all tissues, iodide is concentrated in the thyroid, salivary, and gastric glands. It is also found in the mammary glands, ovaries, placenta, and skin. The thyroid is aggressive in grabbing the lion’s share of iodide (70-80%) available to the body and supplied by the diet. In order for the thyroid to synthesize thyroid hormones, adequate iodide must be made available.

There are certain other nutrients which act antagonistically to iodine. They include arsenic, bromide, and perchlorate. Perchlorate is found in nature but is also heavily used in rocket fuel and for other industrial uses. Bromide replaced iodine in commercial baked goods back in the 1960’s. So you can see contamination by perchlorate and bromide exposure have increased over the years.

There is important published research on the effects of iodine deficiency in animals and humans. An extremely interesting focus of this research is the effect of iodine deficiency in breast tissue, more specifically the possible connections to the development of fibrocystic breast condition. The current thinking is that Iodine may modulate the effect of estrogen in breast tissue. This research has been based on small human studies, and larger studies are needed before significance can be established. Research continues in this important area.

So how can you ensure adequate intake from your diet? Lightly season foods with a good iodine-containing sea salt. I particularly like Celtic Salt. Salt water shellfish and fish are fine sources too. My favorite, of course, are the sea vegetables. In a previous blog about Calcium, I discussed just how nutrient dense these vegetables can be. I encourage you again to experiment with Wakame, Kombu, Nori, Dulse, Arame, etc. They are so delicious!

Iodine supplements are readily available. However, I do not advise that you supplement with this micromineral without consulting with your health practitioner. Toxicity can result. Your practitioner can order a urine iodine test to determine your current levels.