On Iodine, Salt And The Thyroid

Iodised salt scam article: http://iodineresearch.com/debunked.html

Summary: Only 10% of iodine in iodine-enriched salt is absorbed in the body, and iodine evaporates almost totally after about 40 days. Iodine was used as a flour treatment but was replaced with bromine (a sedative), which competes with iodine, as do fluoride and chlorine. Dr. Mercola on Bromine HERE

Therapeutic uses:

  • Helps to metabolise excess fat
  • s important for physical and mental development of the fetus
  • Is also needed for a healthy thyroid (see below) gland and for the prevention of goitre.
  • Can help prevent and treat breast cancer and thyroid cancer (see below)
  • Fatigue
  • In cancer treatment, iodine prevents the development of Tamoxifen resistance (a cancer drug) and helps in cell apopthosis (cell death). Iodine is especially useful in treating thyroid cancer and hormonal cancers, eg: breast cancer. Iodine deficiency can be a contributing factor to breast cancer.

About the thyroid:

Full endocrineweb.com article HERE. The sole function of the thyroid gland is to make thyroid hormone. This hormone has an effect on nearly all tissues of the body where it increases cellular activity [so an underactive thyroid means more body fat? Is that why Japanese people are relatively not that fat?]. The function of the thyroid, therefore, is to regulate the body’s metabolism…A 2004 study in the journal Thyroid found that stress is one of the environmental factors for thyroid autoimmunity. Stress can aggravate hypothyroidism, and you can be stressed because of the hypothyroidism symptoms.

Full yourhormones.info article HERE. The thyroid gland produces hormones which regulate the body’s metabolic rate as well as heart and digestive function, muscle control, brain development and bone maintenance. Its correct functioning depends on having a good supply of iodine from the diet.  The release of thyroid hormones from the thyroid gland is controlled by thyrotrophin-releasing hormone(TRH) from the hypothalamus in the brain and by thyroid stimulating hormone (TSH) produced by the pituitary gland. This forms part of a feedback loop called the hypothalamic-pituitary-thyroid axis. 

What hormones does my thyroid gland produce?

The thyroid gland produces thyroxine (T4), which is a relatively inactive prohormone and lower amounts of the active hormone, triiodothyronine (T3). Collectively, T3 and T4 are referred to as the thyroid hormones. Twenty percent of the body’s triiodothyronine is made by the thyroid gland; the other 80% comes from thyroxine converted by organs such as the liver or kidneys. The thyroid gland also produces calcitonin from cells called C-cells. Calcitonin is understood to play a role in regulating calcium levels in the body, but its exact function in humans remains unclear. 

Signs of deficiency:

  • Iodine and brain health: mental retardation, brain fog, sluggishness, ADHD, cretinism and reduced intelligence.
  • Increased body weight
  • Decreased thyroid activity
  • Cancers of the breast and thyroid, as well as other hormone cancers

Animal sources of iodine: seafood

Vegetable sources of iodine:

Kelp, sea salt (in small quantities), sesame seeds, soybeans, summer squash, swiss chard & turnip greens.

Foods that block the uptake of iodine, so-called goitrogenic foods:

Brussels sprouts, cabbage, cauliflower, kale, peaches, pears, spinach & turnips. However, you should not reduce your intake of cruciferous vegetables just to up your iodine levels. Duh.

Foods that contribute to the absorption of iodine:

Selenium helps to metabolise iodine. Areas that have high iodine deficiency and increased thyroid problems also have low selenium levels.


Iodide has one less electron so is more water soluble, and is used mostly by thyroid. Choose a supplement that uses both iodine and iodide. 12 – 50 iodine/idide blend is best.


It is said that too much iodine leads to hyperthyroidism, a serious condition. However, in Japan, where people eat 80 times the amount of seafood that Americans do, hyperthyroidism is relatively not that prevalent.

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