iodine is necessary for the thyroid gland to make thyroxin hormone. thyroxin regulates carbohydrates, protein and fat metabolism in the body so as to provide the best balance for growth. iodine is essential for the synthesis of thyroxin so the use of iodised salt is advisable.
Defficiency of iodine leads to hypothyroidism, goiter and especially to mental retardation; so all peoples must have a normal daily intake of iodine (not lower than 150 γg).
But it is not recommended to use iodized salt by persons with hyperthyroidism.
Iodised salt
NO !!
Iodised salt is recommended to avoid idiocy.See this link: http://en.wikipedia.org/wiki/Iodised_salt.
The healthier salt is iodised; but the sea salt can be also iodised.
Iodised salt (sodium chloride) contain iodine (as potassium/sodium iodide or potassium/sodium iodate). The concentration of iodine is 20 +/- 5 mg/kg. Iodised salt is recommended to avoid idiocy.
KFC use fine iodised sodium chloride.
Iodised table salt contain sodium chloride, potassium iodide (or iodate) and anticaking substances.
It's called iodised salt when a little bit of iodine has been added to it. Iodine is good for your thyroid gland, that's why.
Thankfully it is now very easy to get non-iodised salt at local grocery chains. Brands like Kroger, Harveys, and Publix all have store brand non-iodised salt. Lawreys and Morton also sell a non-iodised salt on their website.
waitrose or ocado
There are commonly two types of 'regular' table salt. One is 'Iodised' the other is not. Do not use the 'Iodised' salt in fish tanks. I would advise you to use cooking salt as that is not 'Iodised'.
See the following link: http://www.sspindia.com/salt-processing-plant.html#iodised-salt-processing-plant.