The Journal of the American Medical Association published research that showed an increase of breast cancer with the use of synthroid/levoxyl along with an iodine deficiency.
The RDA for iodine is in micrograms and is drastically low. Most patients I see that need iodine need milligram dosage.
Iodine is necessary for proper thyroid function and iodized salt does not count. Iodized salt was distributed to prevent goiters from developing in people primarily in the Midwest/great lakes area (the goiter belt). Currently, 200 million people are affected by goiters. Not only would tablespoons of iodized salt not supply therapeutic doses of iodine, but the aluminum that is used as a anti-caking agent can build up in some sensitive individuals. Aluminum is implicated in Alzheimer’s disease.